Which airport is the most popular layover for flights between Atlanta and London Heathrow Airport?

Istanbul (IST) was the most common stop: 42% of momondo users choosing 1-stop flights on this route connected there.

Which airline has the best punctuality record on Atlanta to London flights?

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

Which layover airport has the shortest travel time from Atlanta to London Heathrow Airport?

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 12h 13m.

How many flights depart from Atlanta to London Heathrow Airport on average per day?

The number of flights available between Atlanta and London Heathrow Airport is 23 per day as of November 2025. The most frequent departure time is 10:00PM, with 86% of daily flights leaving in the evening.

What day of the week experiences the fewest flight delays on this route?

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

What is the most punctual flight time for Atlanta to London flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

What is the cheapest airline that flies from Atlanta Hartsfield-Jackson to London Heathrow?

JetBlue is the most popular carrier operating from Atlanta Hartsfield-Jackson to London Heathrow

How often are flights from Atlanta to London delayed?

Historically, on average around 20% of flights between Atlanta and London have experienced a delay on any given week. The average delay length over the past 12 months has been 136 minutes.

How many flights depart from Atlanta to London Heathrow Airport on average per week?

The number of flights available between Atlanta and London Heathrow Airport is 162 per week as of November 2025. The most frequent departure day is Wed, with 15% of weekly flights leaving on this day.

Which layover airport offers the lowest fares from Atlanta to London Heathrow Airport?

Flights via New York (JFK) offer the lowest average round-trip price of $440.

What airlines fly to London Heathrow Airport?

Delta, British Airways and Virgin Atlantic are the top three most popular airlines that fly to London Heathrow Airport from Atlanta according to our data. Delta is the first choice among our users, with 44% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 15 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Atlanta to London Heathrow Airport?

Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 34m.

When did momondo last update prices for flights from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport?

Prices for flights from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport?

As of November 2025, there are 15 operators available to choose from for flights from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport.

How old do you have to be to fly from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$254 Cheap Flights from Atlanta to London Heathrow Airport in 2025/26

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9:00 pm - 4:25 pmATL-LHR

15h 25m2 stops

6:40 am - 6:25 pmLHR-ATL

15h 45m1 stop

$623Scandinavian Airlines

Find Deal

sø., mar. 8 - ma., mar. 16

8:00 pm - 4:25 pmATL-LHR

15h 25m2 stops

7:05 am - 5:25 pmLHR-ATL

15h 20m2 stops

$625Scandinavian Airlines

Find Deal

to., feb. 19 - ma., feb. 23

4:10 pm - 8:45 pmATL-LHR

23h 35m1 stop

7:25 am - 3:10 pmLHR-ATL

12h 45m1 stop

$626JetBlue

Find Deal

sø., jan. 11 - ti., jan. 20

6:10 am - 7:10 amATL-LHR

20h 00m3 stops

1:00 pm - 12:37 amLHR-ATL

16h 37m2 stops

$627Multiple Airlines

Find Deal

ma., des. 8 - to., des. 11

9:00 pm - 4:25 pmATL-LHR

15h 25m2 stops

6:40 am - 6:25 pmLHR-ATL

15h 45m2 stops

$628Scandinavian Airlines

Find Deal

ma., mar. 9 - ma., mar. 16

9:00 pm - 6:50 pmATL-LHR

17h 50m2 stops

6:40 am - 6:25 pmLHR-ATL

15h 45m1 stop

$629Scandinavian Airlines

Find Deal

ma., mar. 9 - ma., mar. 16

8:00 pm - 7:55 pmATL-LHR

18h 55m2 stops

6:40 am - 5:25 pmLHR-ATL

15h 45m2 stops

$630Scandinavian Airlines

Find Deal

ma., des. 1 - sø., des. 7

8:00 pm - 4:00 pmATL-LHR

15h 00m1 stop

7:30 pm - 5:25 pmLHR-ATL

26h 55m1 stop

$631Scandinavian Airlines

Find Deal

ma., des. 1 - sø., jan. 11

8:00 pm - 9:20 amATL-LHR

32h 20m1 stop

6:40 pm - 5:25 pmLHR-ATL

27h 45m1 stop

$632Scandinavian Airlines

Find Deal

fr., feb. 13 - sø., feb. 22

4:20 pm - 7:10 amATL-LHR

33h 50m3 stops

12:05 pm - 7:44 amLHR-ATL

24h 39m2 stops

$633Multiple Airlines

Find Deal

fr., des. 5 - ti., des. 9

Scandinavian Airlines flights from Atlanta to London Heathrow Airport

Our best Scandinavian Airlines deals on Atlanta to London Heathrow Airport flight tickets

Scandinavian Airlines

Mar 8

ATL9:00 pmAtlanta Hartsfield-Jackson

15h 25m

2 stops

LHR4:25 pmLondon Heathrow

Mar 16

LHR6:40 amLondon Heathrow

15h 45m

1 stop

ATL6:25 pmAtlanta Hartsfield-Jackson

$623

Find similar

Scandinavian Airlines

Feb 19

ATL8:00 pmAtlanta Hartsfield-Jackson

15h 25m

2 stops

LHR4:25 pmLondon Heathrow

Feb 23

LHR7:05 amLondon Heathrow

15h 20m

2 stops

ATL5:25 pmAtlanta Hartsfield-Jackson

$625

Find similar

Scandinavian Airlines

Mar 9

ATL9:00 pmAtlanta Hartsfield-Jackson

15h 25m

2 stops

LHR4:25 pmLondon Heathrow

Mar 16

LHR6:40 amLondon Heathrow

15h 45m

2 stops

ATL6:25 pmAtlanta Hartsfield-Jackson

$628

Find similar

JetBlue flights from Atlanta to London Heathrow Airport

Our best JetBlue deals on Atlanta to London Heathrow Airport flight tickets

JetBlue

Jan 11

ATL4:10 pmAtlanta Hartsfield-Jackson

23h 35m

1 stop

LHR8:45 pmLondon Heathrow

Jan 20

LHR7:25 amLondon Heathrow

12h 45m

1 stop

ATL3:10 pmAtlanta Hartsfield-Jackson

$626

Find similar

JetBlue

Jan 9

ATL1:45 pmAtlanta Hartsfield-Jackson

14h 45m

1 stop

LHR9:30 amLondon Heathrow

Jan 23

LHR8:05 amLondon Heathrow

16h 55m

1 stop

ATL8:00 pmAtlanta Hartsfield-Jackson

$635

Find similar

JetBlue

Mar 1

ATL10:20 amAtlanta Hartsfield-Jackson

18h 10m

1 stop

LHR9:30 amLondon Heathrow

Mar 6

LHR8:05 amLondon Heathrow

15h 05m

1 stop

ATL6:10 pmAtlanta Hartsfield-Jackson

$636

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Atlanta to London Heathrow Airport that are best for you.

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Route

Depart

Return

Price

AtlantaLondon

ATL - LHR

ATLLHR

Atlanta Hartsfield-Jackson

sø. 3/8

9:00 pm-4:25 pm

2 stops15h 25m

London Heathrow

ma. 3/16

6:40 am-6:25 pm

1 stop15h 45m

$623

AtlantaLondon

ATL - LHR

ATLLHR

Atlanta Hartsfield-Jackson

to. 2/19

8:00 pm-4:25 pm

2 stops15h 25m

London Heathrow

ma. 2/23

7:05 am-5:25 pm

2 stops15h 20m

$625

AtlantaLondon

ATL - LHR

ATLLHR

Atlanta Hartsfield-Jackson

sø. 1/11

4:10 pm-8:45 pm

1 stop23h 35m

London Heathrow

ti. 1/20

7:25 am-3:10 pm

1 stop12h 45m

$626

AtlantaLondon

ATL - LHR

ATLLHR

Atlanta Hartsfield-Jackson

ma. 12/8

6:10 am-7:10 am

3 stops20h 00m

London Heathrow

to. 12/11

1:00 pm-12:37 am

2 stops16h 37m

$627

AtlantaLondon

ATL - LHR

ATLLHR

Atlanta Hartsfield-Jackson

ma. 3/9

9:00 pm-4:25 pm

2 stops15h 25m

London Heathrow

ma. 3/16

6:40 am-6:25 pm

2 stops15h 45m

$628

AtlantaLondon

ATL - LHR

ATLLHR

Atlanta Hartsfield-Jackson

ma. 3/9

9:00 pm-6:50 pm

2 stops17h 50m

London Heathrow

ma. 3/16

6:40 am-6:25 pm

1 stop15h 45m

$629

AtlantaLondon

ATL - LHR

ATLLHR

Atlanta Hartsfield-Jackson

ma. 12/1

8:00 pm-7:55 pm

2 stops18h 55m

London Heathrow

sø. 12/7

6:40 am-5:25 pm

2 stops15h 45m

$630

AtlantaLondon

ATL - LHR

ATLLHR

Atlanta Hartsfield-Jackson

ma. 12/1

8:00 pm-4:00 pm

1 stop15h 00m

London Heathrow

sø. 1/11

7:30 pm-5:25 pm

1 stop26h 55m

$631

AtlantaLondon

ATL - LHR

ATLLHR

Atlanta Hartsfield-Jackson

fr. 2/13

8:00 pm-9:20 am

1 stop32h 20m

London Heathrow

sø. 2/22

6:40 pm-5:25 pm

1 stop27h 45m

$632

AtlantaLondon

ATL - LHR

ATLLHR

Atlanta Hartsfield-Jackson

fr. 12/5

4:20 pm-7:10 am

3 stops33h 50m

London Heathrow

ti. 12/9

12:05 pm-7:44 am

2 stops24h 39m

$633

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Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Atlanta to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Delays

Layovers

Other information

What is the typical price of a round-trip flight between Atlanta and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

The month of January is, on average, the cheapest month to fly to London Heathrow Airport from Atlanta, with most prices found around $709. If you’re not able to fly to London Heathrow Airport in January, then October is your next best option. Flight prices from Atlanta to London Heathrow Airport during October average around $717.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $860. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $988.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at noon. momondo users have found flights departing from Atlanta to London Heathrow Airport at noon for as low as $878. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $959.

What is the cheapest Atlanta Hartsfield-Jackson to London Heathrow flight route?

Fly from Atlanta Hartsfield-Jackson to London Heathrow for the best Atlanta Hartsfield-Jackson - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Atlanta when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $867 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Atlanta for as low as $795 on momondo.

What cabin class options are available on Atlanta Hartsfield-Jackson to London Heathrow flights?

There are 4 cabin classes available to choose from on Atlanta Hartsfield-Jackson to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Atlanta to London Heathrow Airport flight prices changed over time?

As of November 2025, prices for Atlanta to London Heathrow Airport flights are approximately 7% cheaper when compared to flights at the same time last year.

When to book flights from Atlanta to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Atlanta to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Atlanta to London Heathrow Airport (ATL to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Atlanta to London Heathrow Airport

Best Price Found	$439
Fastest flight time	7h 55m
Direct flights	Every day

The best one-way flight to London Heathrow Airport from Atlanta in the past 72 hours is $439. The best round-trip flight deal from Atlanta to London Heathrow Airport found on momondo in the last 72 hours is $707.

The fastest flight from Atlanta to London Heathrow Airport takes 7h 55m

Direct flights go from Atlanta to London Heathrow Airport every day.

Search flight deals

How far is Atlanta Hartsfield-Jackson to London Heathrow by plane?
There are 4190.8 mi between Atlanta Hartsfield-Jackson and London Heathrow. In terms of flight time, this usually takes a little over 11h 25m.
When did momondo last update prices for flights from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport?
Prices for flights from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport?
As of November 2025, there are 15 operators available to choose from for flights from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport.
How old do you have to be to fly from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Atlanta to London Heathrow Airport?
momondo data reveals that the most frequently booked plane model on the route from Atlanta to London Heathrow Airport is Boeing 777, representing 29.44% of all bookings. The subsequent popular models are Airbus A350-1000 at 23.78%, Boeing 767-400 at 17.24%, and Airbus A330-200 at 15.61%.
What is the most popular airline from Atlanta to London Heathrow Airport?
momondo data reveals that the most frequently booked airline on the route from Atlanta to London Heathrow Airport is Delta, representing 33% of all bookings. The subsequent popular airlines are British Airways at 22%, Virgin Atlantic at 15%, and Scandinavian Airlines at 5%.

Best airlines flying from Atlanta to London Heathrow Airport

Compare and see reviews for airlines that fly from Atlanta to London Heathrow Airport with momondo

Airline	Rating	Free Cancellation	Price
JetBlue	PriceFrom $93	Free Cancellation	Rating 7.2 2,902 reviews	Search JetBlue flights
United Airlines	PriceFrom $326	Free Cancellation	Rating 7.4 9,029 reviews	Search United Airlines flights
Air Canada	PriceFrom $382	Free Cancellation	Rating 7.1 10,463 reviews	Search Air Canada flights
Scandinavian Airlines	PriceFrom $430	Free Cancellation	Rating 7.4 1,584 reviews	Search Scandinavian Airlines flights
Aer Lingus	PriceFrom $511	Free Cancellation	Rating 7.2 1,377 reviews	Search Aer Lingus flights
British Airways	PriceFrom $515	Free Cancellation	Rating 6.7 7,533 reviews	Search British Airways flights
Iberia	PriceFrom $564	Free Cancellation	Rating 7.0 3,027 reviews	Search Iberia flights
Air France	PriceFrom $572	Free Cancellation	Rating 7.4 1,493 reviews	Search Air France flights
Lufthansa	PriceFrom $594	Free Cancellation	Rating 6.8 7,579 reviews	Search Lufthansa flights
American Airlines	PriceFrom $610	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights

Delta Flights From Atlanta to London Heathrow Airport
Delta flies from Atlanta to London Heathrow Airport around 23 times per week, with 8,002 momondo users rating the airline 7.9/10. The cheapest Delta deal from Atlanta to London Heathrow Airport in the last 72 hours was $613 (round-trip), much lower than the average airfare cost of $974 for Delta flights on this route.
KLM Flights From Atlanta to London Heathrow Airport
Across 1,414 KLM reviews on momondo, the average score is 7.7/10. KLM flies from Atlanta to London Heathrow Airport about 28 times each week, with ticket deals ranging from $688 to $941. Price data is based on momondo searches in the last 72 hours.

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Dover

Luton

Slough

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Dartford

Stratford-upon-Avon

Crawley

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Romford

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Cobham

Swindon

Why use momondo?

Why should I use momondo to find a flight deal from Atlanta to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Atlanta to London. momondo saves you time and could save you money on your trip.

Can I find flights from Atlanta to London with flexible booking policies on momondo?

All flight searches from Atlanta to London on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Atlanta to London?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Atlanta.

I’m not ready to book a flight from Atlanta to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Atlanta to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

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Cheap flights from Atlanta to London from $254

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Atlanta to London departing on 12/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Scandinavian Airlines flights from Atlanta to London Heathrow Airport

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Our best JetBlue deals on Atlanta to London Heathrow Airport flight tickets

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How to get the cheapest flight ticket from Atlanta to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Atlanta and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $860. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $988.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

What is the cheapest Atlanta Hartsfield-Jackson to London Heathrow flight route?

Fly from Atlanta Hartsfield-Jackson to London Heathrow for the best Atlanta Hartsfield-Jackson - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

What cabin class options are available on Atlanta Hartsfield-Jackson to London Heathrow flights?

There are 4 cabin classes available to choose from on Atlanta Hartsfield-Jackson to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Atlanta to London Heathrow Airport flight prices changed over time?

As of November 2025, prices for Atlanta to London Heathrow Airport flights are approximately 7% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Atlanta Hartsfield-Jackson to London Heathrow?

JetBlue is the most popular carrier operating from Atlanta Hartsfield-Jackson to London Heathrow

What airlines fly to London Heathrow Airport?

How often are flights from Atlanta to London delayed?

Historically, on average around 20% of flights between Atlanta and London have experienced a delay on any given week. The average delay length over the past 12 months has been 136 minutes.

What is the most punctual flight time for Atlanta to London flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Atlanta to London flights?

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

Which airport is the most popular layover for flights between Atlanta and London Heathrow Airport?

Istanbul (IST) was the most common stop: 42% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Atlanta to London Heathrow Airport?

Flights via New York (JFK) offer the lowest average round-trip price of $440.

Which layover airport has the shortest travel time from Atlanta to London Heathrow Airport?

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 12h 13m.

Which layover airport has the shortest connection time from Atlanta to London Heathrow Airport?

Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 34m.

How many flights depart from Atlanta to London Heathrow Airport on average per day?

The number of flights available between Atlanta and London Heathrow Airport is 23 per day as of November 2025. The most frequent departure time is 10:00PM, with 86% of daily flights leaving in the evening.

How many flights depart from Atlanta to London Heathrow Airport on average per week?

The number of flights available between Atlanta and London Heathrow Airport is 162 per week as of November 2025. The most frequent departure day is Wed, with 15% of weekly flights leaving on this day.

When to book flights from Atlanta to London Heathrow Airport

Cheap Atlanta to London Heathrow Airport (ATL to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Atlanta to London Heathrow Airport

Best Price Found

Fastest flight time

Direct flights

How far is Atlanta Hartsfield-Jackson to London Heathrow by plane?

When did momondo last update prices for flights from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport?

How many operators does momondo search for flights from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport?

How old do you have to be to fly from Atlanta Hartsfield-Jackson Airport to London Heathrow Airport?

What documentation or ID do you need to fly to London Heathrow Airport?

What is the most popular plane model from Atlanta to London Heathrow Airport?

What is the most popular airline from Atlanta to London Heathrow Airport?

Best airlines flying from Atlanta to London Heathrow Airport

Compare and see reviews for airlines that fly from Atlanta to London Heathrow Airport with momondo

Delta Flights From Atlanta to London Heathrow Airport

KLM Flights From Atlanta to London Heathrow Airport

Traveling to a place near London?

Why use momondo?

Why should I use momondo to find a flight deal from Atlanta to London?

Can I find flights from Atlanta to London with flexible booking policies on momondo?