What is the cheapest airline that flies from Idaho to London Heathrow?

Iberia, Delta, and Virgin Atlantic are the most popular carriers operating from Idaho to London Heathrow

What airlines fly to London Heathrow Airport?

United Airlines, Virgin Atlantic and Delta are the top three most popular airlines that fly to London Heathrow Airport from Idaho according to our data. United Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 3 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to London Heathrow Airport?

On average, it takes 12h 03m to fly from Idaho to London Heathrow Airport if you fly out of Idaho Falls (the most popular airport in Idaho) and into London Heathrow Airport (the most popular airport in London Heathrow Airport). If you’re flying out of Boise and into London Heathrow Airport, then the flight time is around 12h 52m.

When did momondo last update prices for flights from Idaho to London Heathrow Airport?

Prices for flights from Idaho to London Heathrow Airport refresh daily.

How many operators does momondo search for flights from Idaho to London Heathrow Airport?

The number of operators available for flights from Idaho to London Heathrow Airport is 4 as of August 2026.

How old do you have to be to fly from Idaho to London Heathrow Airport?

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 Idaho to London Heathrow Airport.

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

The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$324 Cheap Flights from Idaho to London Heathrow Airport in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Idaho to London

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

12:30 pm - 7:55 amJAC Jackson Hole-LHR London Heathrow

12h 25m1 stop Chicago O'Hare Intl

6:50 am - 9:02 pmLHR London Heathrow-JAC Jackson Hole

21h 12m3 stops Brussels Bruxelles-National Chicago O'Hare Intl Denver Intl

$747United Airlines

Sun, Dec 6 - Tue, Dec 8

12:30 pm - 7:55 amJAC Jackson Hole-LHR London Heathrow

12h 25m1 stop Chicago O'Hare Intl

6:35 am - 9:02 pmLHR London Heathrow-JAC Jackson Hole

21h 27m2 stops Munich Franz Josef Strauss Denver Intl

$749United Airlines

Sun, Dec 6 - Tue, Dec 8

6:20 am - 7:10 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

17h 50m2 stops San Francisco Montreal Pierre Elliott Trudeau Intl

6:35 am - 5:55 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

18h 20m2 stops Munich Franz Josef Strauss Denver Intl

$753Multiple Airlines

Sun, Dec 6 - Tue, Dec 8

12:30 pm - 7:55 amJAC Jackson Hole-LHR London Heathrow

12h 25m1 stop Chicago O'Hare Intl

6:35 am - 9:02 pmLHR London Heathrow-JAC Jackson Hole

21h 27m2 stops Munich Franz Josef Strauss Denver Intl

$800Lufthansa

Sun, Dec 6 - Tue, Dec 8

11:30 am - 10:45 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

16h 15m2 stops Salt Lake City Amsterdam Schiphol

10:45 am - 5:58 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

14h 13m1 stop Salt Lake City

$815Delta

Sun, Dec 6 - Tue, Dec 8

11:30 am - 10:45 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

16h 15m2 stops Salt Lake City Amsterdam Schiphol

10:45 am - 12:04 amLHR London Heathrow-BOI Boise Air Term. Gowen Fld

20h 19m1 stop Salt Lake City

$816Delta

Sun, Dec 6 - Tue, Dec 8

12:17 pm - 11:20 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

16h 03m1 stop Seattle/Tacoma Intl

12:25 pm - 11:59 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

18h 34m1 stop Minneapolis St Paul

$924Virgin Atlantic

Mon, Sep 28 - Wed, Oct 14

12:45 pm - 12:50 pmGEG Spokane-LHR London Heathrow

16h 05m1 stop Dallas/Fort Worth

10:05 am - 11:01 pmLHR London Heathrow-GEG Spokane

20h 56m1 stop Phoenix Sky Harbor Intl

$935American Airlines

Wed, Sep 23 - Wed, Oct 14

12:49 pm - 10:55 amGEG Spokane-LHR London Heathrow

14h 06m1 stop Dallas/Fort Worth

11:50 am - 8:43 pmLHR London Heathrow-GEG Spokane

15h 53m1 stop Dallas/Fort Worth

$935American Airlines

Wed, Oct 14 - Wed, Oct 28

4:14 pm - 4:30 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

17h 16m1 stop Los Angeles

9:50 am - 11:55 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

21h 05m1 stop Minneapolis St Paul

$937Virgin Atlantic

Wed, Dec 16 - Wed, Jan 20

Cheap last minute flights

Enter your travel dates to find the best prices.

9:25 am - 2:00 pmGEG Spokane-LHR London Heathrow

20h 35m1 stop Seattle/Tacoma Intl

6:30 am - 4:09 pmLHR London Heathrow-GEG Spokane

17h 39m2 stops Amsterdam Schiphol Salt Lake City

$1,127Delta

Thu, Aug 20 - Sun, Aug 30

1:37 pm - 2:40 pmGEG Spokane-LHR London Heathrow

17h 03m2 stops Denver Intl Frankfurt am Main

6:30 am - 10:36 pmLHR London Heathrow-GEG Spokane

24h 06m2 stops Frankfurt am Main San Francisco

$1,130Lufthansa

Thu, Aug 20 - Sun, Aug 30

11:09 am - 3:35 pmGEG Spokane-LHR London Heathrow

20h 26m1 stop Seattle/Tacoma Intl

11:15 am - 9:30 pmLHR London Heathrow-GEG Spokane

18h 15m1 stop Atlanta Hartsfield-Jackson

$1,156KLM

Thu, Aug 20 - Sun, Aug 30

7:48 pm - 3:05 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

12h 17m1 stop Seattle/Tacoma Intl

5:00 pm - 9:52 amLHR London Heathrow-BOI Boise Air Term. Gowen Fld

23h 52m1 stop Seattle/Tacoma Intl

$1,217Alaska Airlines

Thu, Aug 20 - Sat, Aug 22

6:30 am - 10:00 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

20h 30m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

6:55 am - 11:06 amLHR London Heathrow-BOI Boise Air Term. Gowen Fld

35h 11m2 stops Munich Franz Josef Strauss San Francisco

$1,386United Airlines

Thu, Aug 20 - Sat, Aug 22

2:25 pm - 12:25 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

15h 00m1 stop Denver Intl

6:55 am - 5:16 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

17h 21m2 stops Munich Franz Josef Strauss Denver Intl

$1,444United Airlines

Thu, Aug 20 - Sat, Aug 22

10:35 am - 11:35 amIDA Idaho Falls Fanning Field-LHR London Heathrow

18h 00m2 stops Denver Intl Houston George Bush Intcntl

6:55 am - 5:16 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

17h 21m2 stops Munich Franz Josef Strauss Denver Intl

$1,448United Airlines

Thu, Aug 20 - Sat, Aug 22

2:44 pm - 9:40 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

11h 56m1 stop Denver Intl

7:30 am - 5:58 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

17h 28m2 stops Frankfurt am Main Denver Intl

$1,454United Airlines

Thu, Aug 20 - Sat, Aug 22

7:00 am - 6:20 amIDA Idaho Falls Fanning Field-LHR London Heathrow

16h 20m1 stop Dallas/Fort Worth

12:55 pm - 9:20 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

15h 25m1 stop Dallas/Fort Worth

$1,532American Airlines

Thu, Aug 20 - Sat, Aug 22

5:00 am - 6:35 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

18h 35m3 stops Denver Intl Chicago O'Hare Intl Toronto Pearson Intl

8:30 am - 7:24 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

17h 54m2 stops Toronto Pearson Intl San Francisco

$1,553Multiple Airlines

Thu, Aug 20 - Sat, Aug 22

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Iberia flights from Idaho to London Heathrow Airport

Our best Iberia deals on Idaho to London Heathrow Airport flight tickets

Iberia

Nov 4

BOI7:00 amBoise Air Term. Gowen Fld

18h 15m

1 stop

LHR8:15 amLondon Heathrow

Nov 9

LHR7:40 pmLondon Heathrow

25h 05m

2 stops

BOI1:45 pmBoise Air Term. Gowen Fld

$876

Iberia

Jan 13

BOI7:00 amBoise Air Term. Gowen Fld

20h 00m

1 stop

LHR10:00 amLondon Heathrow

Jan 19

LHR6:05 amLondon Heathrow

23h 27m

2 stops

BOI10:32 pmBoise Air Term. Gowen Fld

$878

Iberia

Jan 31

BOI7:00 amBoise Air Term. Gowen Fld

22h 05m

2 stops

LHR12:05 pmLondon Heathrow

Feb 10

LHR7:35 amLondon Heathrow

21h 57m

2 stops

BOI10:32 pmBoise Air Term. Gowen Fld

$886

KLM flights from Idaho to London Heathrow Airport

Our best KLM deals on Idaho to London Heathrow Airport flight tickets

KLM

Dec 1

IDA6:00 amIdaho Falls Fanning Field

21h 00m

1 stop

LHR10:00 amLondon Heathrow

Dec 3

LHR5:50 pmLondon Heathrow

31h 26m

2 stops

IDA6:16 pmIdaho Falls Fanning Field

$877

KLM

Nov 30

JAC1:05 pmJackson Hole

13h 55m

1 stop

LHR10:00 amLondon Heathrow

Dec 7

LHR8:25 pmLondon Heathrow

30h 06m

2 stops

JAC7:31 pmJackson Hole

$878

KLM

Dec 9

BOI1:13 pmBoise Air Term. Gowen Fld

14h 32m

2 stops

LHR10:45 amLondon Heathrow

Jan 12

LHR6:30 amLondon Heathrow

19h 03m

2 stops

BOI6:33 pmBoise Air Term. Gowen Fld

$880

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

JacksonLondon

JAC Jackson Hole - LHR London Heathrow

JACLHR

Jackson Hole

Sun 12/6

12:30 pm-7:55 am

1 stop12h 25m

London Heathrow

Tue 12/8

6:50 am-9:02 pm

3 stops21h 12m

$747

JacksonLondon

JAC Jackson Hole - LHR London Heathrow

JACLHR

Jackson Hole

Sun 12/6

12:30 pm-7:55 am

1 stop12h 25m

London Heathrow

Tue 12/8

6:35 am-9:02 pm

2 stops21h 27m

$749

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sun 12/6

6:20 am-7:10 am

2 stops17h 50m

London Heathrow

Tue 12/8

6:35 am-5:55 pm

2 stops18h 20m

$753

JacksonLondon

JAC Jackson Hole - LHR London Heathrow

JACLHR

Jackson Hole

Sun 12/6

12:30 pm-7:55 am

1 stop12h 25m

London Heathrow

Tue 12/8

6:35 am-9:02 pm

2 stops21h 27m

$800

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sun 12/6

11:30 am-10:45 am

2 stops16h 15m

London Heathrow

Tue 12/8

10:45 am-5:58 pm

1 stop14h 13m

$815

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sun 12/6

11:30 am-10:45 am

2 stops16h 15m

London Heathrow

Tue 12/8

10:45 am-12:04 am

1 stop20h 19m

$816

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Mon 9/28

12:17 pm-11:20 am

1 stop16h 03m

London Heathrow

Wed 10/14

12:25 pm-11:59 pm

1 stop18h 34m

$924

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Wed 9/23

12:45 pm-12:50 pm

1 stop16h 05m

London Heathrow

Wed 10/14

10:05 am-11:01 pm

1 stop20h 56m

$935

Quickest round-trip

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Wed 10/14

12:49 pm-10:55 am

1 stop14h 06m

London Heathrow

Wed 10/28

11:50 am-8:43 pm

1 stop15h 53m

$935

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Wed 12/16

4:14 pm-4:30 pm

1 stop17h 16m

London Heathrow

Wed 1/20

9:50 am-11:55 pm

1 stop21h 05m

$937

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 Idaho 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

Other information

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

The month of November is, on average, the cheapest month to fly to London Heathrow Airport from Idaho, with most prices found around $639. If you’re not able to fly to London Heathrow Airport in November, then October is your next best option. Flight prices from Idaho to London Heathrow Airport during October average around $810.

Can stopping save me money on Idaho to London Heathrow Airport flights?

You could potentially save up to 9% on your flight if you consider stops on a Idaho to London Heathrow Airport flight.

Cheap Idaho to London Heathrow Airport flight deals and tips

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

Best Price Found	$324
Fastest flight time	12h 03m
Direct flights	None

The best one-way flight to London Heathrow Airport from Idaho in the past 72 hours is $324. The best round-trip flight deal from Idaho to London Heathrow Airport found on momondo in the last 72 hours is $747.

The fastest flight from Idaho to London Heathrow Airport takes 12h 03m

There are no direct flights from Idaho to London Heathrow Airport. There are no popular flight routes from Idaho to London Heathrow Airport.

Search flight deals

Frequently asked questions about flying from Idaho to London Heathrow Airport

When did momondo last update prices for flights from Idaho to London Heathrow Airport?
Prices for flights from Idaho to London Heathrow Airport refresh daily.
How many operators does momondo search for flights from Idaho to London Heathrow Airport?
The number of operators available for flights from Idaho to London Heathrow Airport is 4 as of August 2026.
How old do you have to be to fly from Idaho to London Heathrow Airport?
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 Idaho to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Idaho to London Heathrow Airport

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

Airline	Rating	Free Cancellation	Price
Virgin Atlantic	PriceFrom $600	Free Cancellation	Rating 7.4 695 reviews	Search Virgin Atlantic flights
United Airlines	PriceFrom $639	Free Cancellation	Rating 7.4 10,104 reviews	Search United Airlines flights
Delta	PriceFrom $648	Free Cancellation	Rating 7.8 8,500 reviews	Search Delta flights

Hounslow

Gatwick

Milton Keynes

Luton

Hayes

Stratford-upon-Avon

Wembley

Croydon

Dover

Stansted

Richmond

Kingston upon Thames

Harrow

Watford

Cobham

Slough

Uxbridge

Eastbourne

Worthing

Romford

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

It is quick and easy to find Idaho to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

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

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

Once you have performed a search for Idaho to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Idaho to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Flights to London Gatwick Airportfrom $403

Flights to London Stansted Airportfrom $416

Flights to London City Airportfrom $741

Flights to London Luton Airportfrom $487

Flights to Glasgow Intl Airportfrom $552

Flights to Belfast Intl Airportfrom $634

Flights to London Southend Airportfrom $637

Flights to Belfast City Airportfrom $683

Cheap flights from Idaho to London from $324

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho to London departing on 2/8. 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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Iberia flights from Idaho to London Heathrow Airport

Our best Iberia deals on Idaho to London Heathrow Airport flight tickets

KLM flights from Idaho to London Heathrow Airport

Our best KLM deals on Idaho to London Heathrow Airport flight tickets

momondo Fare Finder

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

See travel insights to London from

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

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

Can stopping save me money on Idaho to London Heathrow Airport flights?

What is the cheapest airline that flies from Idaho to London Heathrow?

What airlines fly to London Heathrow Airport?

How long does it take to fly to London Heathrow Airport?

Cheap Idaho to London Heathrow Airport flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Idaho to London Heathrow Airport

Best airlines flying from Idaho to London Heathrow Airport

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

Traveling to a place near London?

Why use momondo?

An easier way to manage your London Heathrow Airport 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 London

Popular cities in the United Kingdom

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

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

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