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

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

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to United Kingdom?

Icelandair, TAP AIR PORTUGAL, and Delta are the most popular carriers operating from Washington, D.C. Dulles Intl to United Kingdom

How often are flights from Washington, D.C. to the United Kingdom delayed?

Historically, on average around 19% of flights between Washington, D.C. and United Kingdom have experienced a delay on any given week. The average delay length over the past 12 months has been 164 minutes.

Which airline has the best punctuality record on Washington, D.C. to the United Kingdom flights?

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 15% of their flights experiencing any sort of delay.

What is the most punctual flight time for Washington, D.C. to the United Kingdom flights?

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

What airlines fly to United Kingdom?

British Airways, United Airlines and Aer Lingus are the top three most popular airlines that fly to United Kingdom from Washington, D.C. Dulles Intl Airport according to our data. British Airways is the first choice among our users, with 47% of people opting to fly with this airline when traveling to United Kingdom. Keep in mind that there are 17 different airlines that fly to United Kingdom on a routine basis, so you have a few additional options to choose from.

How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to United Kingdom?

As of March 2026, there are 17 operators available to choose from for flights from Washington, D.C. Dulles Intl Airport to United Kingdom.

How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to United Kingdom?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to United Kingdom.

What documentation or ID do you need to fly to United Kingdom?

The required travel and health documents for your United Kingdom 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 United Kingdom. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$196 Cheap Flights from Washington, D.C. Dulles Intl Airport to United Kingdom in 2026

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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to the United Kingdom

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:30 pm - 1:25 pm

IAD

GLA

11h 55m

1 stop

2:30 pm - 7:20 pm

GLA

IAD

9h 50m

1 stop

$510Icelandair

Wed, Apr 1 - Fri, Apr 17

8:30 pm - 1:25 pm

IAD

GLA

11h 55m

1 stop

2:20 pm - 7:20 pm

GLA

IAD

10h 00m

1 stop

$518Icelandair

Mon, Apr 27 - Tue, May 5

8:20 pm - 10:00 am

IAD

MAN

32h 40m

2 stops

8:40 am - 5:00 pm

MAN

IAD

37h 20m

2 stops

$564Scandinavian Airlines

Thu, Apr 23 - Sun, Apr 26

8:20 pm - 9:20 am

IAD

LHR

32h 00m

1 stop

7:05 am - 5:00 pm

LHR

IAD

14h 55m

2 stops

$570Scandinavian Airlines

Mon, Apr 20 - Thu, Apr 23

10:35 pm - 10:55 pm

IAD

LHR

19h 20m

1 stop

6:00 am - 3:10 pm

LHR

IAD

14h 10m

1 stop

$574TAP AIR PORTUGAL

Sat, Apr 18 - Sun, Apr 26

10:35 pm - 9:45 am

IAD

LGW

30h 10m

1 stop

9:15 pm - 3:10 pm

LGW

IAD

22h 55m

2 stops

$575TAP AIR PORTUGAL

Sat, Apr 25 - Mon, May 4

7:05 pm - 5:20 pm

IAD

LCY

18h 15m

1 stop

6:55 pm - 5:05 pm

LCY

IAD

26h 10m

1 stop

$632Virgin Atlantic

Tue, Mar 17 - Tue, Mar 24

7:05 pm - 7:15 am

IAD

LCY

32h 10m

1 stop

10:00 am - 5:05 pm

LCY

IAD

11h 05m

1 stop

$635Virgin Atlantic

Sun, Mar 15 - Tue, Mar 24

7:50 pm - 5:50 pm

IAD

BHX

18h 00m

1 stop

1:30 pm - 5:05 pm

BHX

IAD

31h 35m

1 stop

$643Delta

Tue, Mar 10 - Wed, Mar 25

10:40 pm - 9:30 am

IAD

BHX

30h 50m

1 stop

6:15 am - 5:05 pm

BHX

IAD

14h 50m

1 stop

$645Delta

Wed, Mar 11 - Wed, Mar 25

Aer Lingus flights from Washington, D.C. Dulles Intl Airport to United Kingdom

Our best Aer Lingus deals on Washington, D.C. Dulles Intl Airport to United Kingdom flight tickets

Aer Lingus

Mar 15

IAD6:05 pmWashington, D.C. Dulles Intl

10h 00m

1 stop

LHR8:05 amLondon Heathrow

Mar 24

LHR8:50 amLondon Heathrow

11h 45m

1 stop

IAD4:35 pmWashington, D.C. Dulles Intl

$606

Aer Lingus

Mar 15

IAD6:05 pmWashington, D.C. Dulles Intl

10h 00m

1 stop

LHR8:05 amLondon Heathrow

Mar 24

LHR8:50 amLondon Heathrow

11h 45m

1 stop

IAD4:35 pmWashington, D.C. Dulles Intl

$607

Aer Lingus

Mar 2

IAD9:00 pmWashington, D.C. Dulles Intl

11h 25m

1 stop

MAN1:25 pmManchester

Mar 5

MAN9:50 amManchester

14h 40m

1 stop

IAD7:30 pmWashington, D.C. Dulles Intl

$608

American Airlines flights from Washington, D.C. Dulles Intl Airport to United Kingdom

Our best American Airlines deals on Washington, D.C. Dulles Intl Airport to United Kingdom flight tickets

American Airlines

Mar 15

IAD4:46 pmWashington, D.C. Dulles Intl

12h 29m

1 stop

LHR9:15 amLondon Heathrow

Mar 24

LHR12:10 pmLondon Heathrow

8h 25m

IAD4:35 pmWashington, D.C. Dulles Intl

$644

American Airlines

Mar 11

IAD7:20 pmWashington, D.C. Dulles Intl

7h 10m

LHR6:30 amLondon Heathrow

Mar 19

LHR11:45 amLondon Heathrow

12h 45m

1 stop

IAD8:30 pmWashington, D.C. Dulles Intl

$655

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

Wed 4/1

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

Fri 4/17

2:30 pm-7:20 pm

1 stop9h 50m

$510

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

Mon 4/27

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

Tue 5/5

2:20 pm-7:20 pm

1 stop10h 00m

$518

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

Thu 4/23

8:20 pm-10:00 am

2 stops32h 40m

Manchester

Sun 4/26

8:40 am-5:00 pm

2 stops37h 20m

$564

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 4/20

8:20 pm-9:20 am

1 stop32h 00m

London Heathrow

Thu 4/23

7:05 am-5:00 pm

2 stops14h 55m

$570

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 4/18

10:35 pm-10:55 pm

1 stop19h 20m

London Heathrow

Sun 4/26

6:00 am-3:10 pm

1 stop14h 10m

$574

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 4/25

10:35 pm-9:45 am

1 stop30h 10m

London Gatwick

Mon 5/4

9:15 pm-3:10 pm

2 stops22h 55m

$575

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Tue 3/17

7:05 pm-5:20 pm

1 stop18h 15m

London City

Tue 3/24

6:55 pm-5:05 pm

1 stop26h 10m

$632

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Sun 3/15

7:05 pm-7:15 am

1 stop32h 10m

London City

Tue 3/24

10:00 am-5:05 pm

1 stop11h 05m

$635

Washington, D.C.Birmingham

IAD - BHX

IADBHX

Washington, D.C. Dulles Intl

Tue 3/10

7:50 pm-5:50 pm

1 stop18h 00m

Birmingham

Wed 3/25

1:30 pm-5:05 pm

1 stop31h 35m

$643

Washington, D.C.Birmingham

IAD - BHX

IADBHX

Washington, D.C. Dulles Intl

Wed 3/11

10:40 pm-9:30 am

1 stop30h 50m

Birmingham

Wed 3/25

6:15 am-5:05 pm

1 stop14h 50m

$645

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to United Kingdom

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

Other information

What is the cheapest month to fly to United Kingdom?

In general, September is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $627. If you aren’t able to travel to United Kingdom during the month of September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $649.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to United Kingdom is on a Wednesday when prices can be found for as low as $756. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $880.

What is the cheapest time of day to depart on your flight to United Kingdom?

According to our data, the cheapest time of day to fly to United Kingdom is in the afternoon. momondo users have found flights departing from Washington, D.C. Dulles Intl Airport to United Kingdom in the afternoon for as low as $803. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom are more costly in the evening, with an average ticket price of $810. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Washington, D.C. Dulles Intl to United Kingdom flight route?

Fly from Washington, D.C. Dulles Intl to London Heathrow for the best Washington, D.C. Dulles Intl - United Kingdom flight prices

How far in advance should I book a flight to United Kingdom?

You are more likely to see cheaper flights to United Kingdom from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $765 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Washington, D.C. Dulles Intl Airport for as low as $711 on momondo.

What cabin class options are available on Washington, D.C. Dulles Intl to United Kingdom flights?

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl to United Kingdom flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. Dulles Intl Airport to United Kingdom flights?

You could potentially save up to 5% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to United Kingdom flight.

Cheap Washington, D.C. Dulles Intl Airport to United Kingdom flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to United Kingdom

Best Price Found	$405
Fastest flight time	7h 10m
Direct flights	Every day
Airports in United Kingdom	1,286 airports

The best one-way flight to United Kingdom from Washington, D.C. Dulles Intl Airport in the past 72 hours is $405. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to United Kingdom found on momondo in the last 72 hours is $699.

The fastest flight from Washington, D.C. Dulles Intl Airport to United Kingdom takes 7h 10m

Direct flights go from Washington, D.C. Dulles Intl Airport to United Kingdom every day.

There are 1,286 airports in United Kingdom. From Washington, D.C. Dulles Intl Airport there are direct flights to London Heathrow (LHR), Edinburgh Turnhouse (EDI).

Search flight deals

When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to United Kingdom?
Prices for flights from Washington, D.C. Dulles Intl Airport to United Kingdom refresh daily.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to United Kingdom?
As of March 2026, there are 17 operators available to choose from for flights from Washington, D.C. Dulles Intl Airport to United Kingdom.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to United Kingdom?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to United Kingdom.
What documentation or ID do you need to fly to United Kingdom?
The required travel and health documents for your United Kingdom 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 United Kingdom. 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 Washington, D.C. Dulles Intl Airport to United Kingdom?
Based on momondo bookings for flights between Washington, D.C. Dulles Intl Airport and United Kingdom, the leading plane model is Boeing 777, making up 44.18% of the total bookings. Other popular models include Boeing 787-9 Dreamliner with 16.80%, Airbus A350-1000 with 9.96%, and Boeing 767-400 with 5.49%.

Best airlines flying from Washington, D.C. Dulles Intl Airport to United Kingdom

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to United Kingdom with momondo

Airline	Rating	Free Cancellation	Price
TAP AIR PORTUGAL	PriceFrom $411	Free Cancellation	Rating 7.1 2,155 reviews	Search TAP AIR PORTUGAL flights
Icelandair	PriceFrom $415	Free Cancellation	Rating 7.1 617 reviews	Search Icelandair flights
Air France	PriceFrom $442	Free Cancellation	Rating 7.4 1,541 reviews	Search Air France flights
Scandinavian Airlines	PriceFrom $454	Free Cancellation	Rating 7.3 1,701 reviews	Search Scandinavian Airlines flights
KLM	PriceFrom $488	Free Cancellation	Rating 7.7 1,461 reviews	Search KLM flights
Aer Lingus	PriceFrom $515	Free Cancellation	Rating 7.2 1,464 reviews	Search Aer Lingus flights
Delta	PriceFrom $516	Free Cancellation	Rating 7.9 8,239 reviews	Search Delta flights
British Airways	PriceFrom $523	Free Cancellation	Rating 6.7 7,773 reviews	Search British Airways flights
Virgin Atlantic	PriceFrom $536	Free Cancellation	Rating 7.5 680 reviews	Search Virgin Atlantic flights
United Airlines	PriceFrom $560	Free Cancellation	Rating 7.4 9,372 reviews	Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to United Kingdom?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to United Kingdom. momondo saves you time and could save you money on your trip.

Can I find flights from Washington, D.C. to United Kingdom with flexible booking policies on momondo?

All flight searches from Washington, D.C. to United Kingdom on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington, D.C. to United Kingdom?

momondo helps you find the best flight between Washington, D.C. and United Kingdom by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington, D.C. to United Kingdom right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington, D.C. to United Kingdom flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Popular cities in the United Kingdom

Flights to Londonfrom $343

Flights to Manchesterfrom $341

Flights to Edinburghfrom $399

Flights to Glasgowfrom $352

Flights to Birminghamfrom $396

Flights to Newcastle upon Tynefrom $549

Flights to Belfastfrom $516

Flights to Bristolfrom $458

Flights to Invernessfrom $421

Flights to Liverpoolfrom $497

Flights to Leedsfrom $464

Flights to Aberdeenfrom $516

Cheap flights from Washington, D.C. Dulles Intl Airport to the United Kingdom from $196

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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to the United Kingdom

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Aer Lingus flights from Washington, D.C. Dulles Intl Airport to United Kingdom

Our best Aer Lingus deals on Washington, D.C. Dulles Intl Airport to United Kingdom flight tickets

American Airlines flights from Washington, D.C. Dulles Intl Airport to United Kingdom

Our best American Airlines deals on Washington, D.C. Dulles Intl Airport to United Kingdom flight tickets

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See travel insights to the United Kingdom from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to United Kingdom

What is the cheapest month to fly to United Kingdom?

What is the cheapest day to depart on your flight to United Kingdom?

What is the cheapest time of day to depart on your flight to United Kingdom?

What is the cheapest Washington, D.C. Dulles Intl to United Kingdom flight route?

How far in advance should I book a flight to United Kingdom?

What cabin class options are available on Washington, D.C. Dulles Intl to United Kingdom flights?

Can stopping save me money on Washington, D.C. Dulles Intl Airport to United Kingdom flights?

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to United Kingdom?

What airlines fly to United Kingdom?

How often are flights from Washington, D.C. to the United Kingdom delayed?

What is the most punctual flight time for Washington, D.C. to the United Kingdom flights?

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

Which airline has the best punctuality record on Washington, D.C. to the United Kingdom flights?

How many flights depart from Washington, D.C. Dulles Intl Airport to United Kingdom on average per day?

How many flights depart from Washington, D.C. Dulles Intl Airport to United Kingdom on average per week?

Cheap Washington, D.C. Dulles Intl Airport to United Kingdom flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to United Kingdom

Best Price Found

Fastest flight time

Direct flights

Airports in United Kingdom

Best airlines flying from Washington, D.C. Dulles Intl Airport to United Kingdom

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to United Kingdom with momondo

Why use momondo?

An easier way to manage your United Kingdom trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo

Washington, D.C. Dulles Intl Airport flight routes

According to popular flight searches on momondo this year

United Kingdom flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to the United Kingdom

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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List of cabin classes available on flights landing in the United Kingdom. Availability may vary depending on flight origin and airline.

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