What is the cheapest airline that flies from Idaho Falls Fanning Field to London?

Alaska Airlines and Iberia are the most popular carriers operating from Idaho Falls Fanning Field to London

When did momondo last update prices for flights from Idaho Falls Fanning Field Airport to London?

Prices for flights from Idaho Falls Fanning Field Airport to London are updated daily.

How many operators does momondo search for flights from Idaho Falls Fanning Field Airport to London?

The number of operators available for flights from Idaho Falls Fanning Field Airport to London is 1 as of November 2026.

How old do you have to be to fly from Idaho Falls Fanning Field Airport to London?

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 Idaho Falls Fanning Field Airport to London.

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

The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$555 Cheap Flights from Idaho Falls to London in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Idaho Falls to London

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:03 pm - 3:05 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

16h 02m1 stop Seattle/Tacoma Intl

5:00 pm - 3:29 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

29h 29m1 stop Seattle/Tacoma Intl

$905Alaska Airlines

Wed, Apr 14 - Wed, Apr 21

1:10 pm - 10:00 amIDA Idaho Falls Fanning Field-LHR London Heathrow

13h 50m1 stop Salt Lake City

8:40 am - 10:19 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

20h 39m2 stops Amsterdam Schiphol Salt Lake City

$920Virgin Atlantic

Wed, Apr 14 - Wed, Apr 21

1:10 pm - 1:05 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

16h 55m2 stops Salt Lake City Minneapolis St Paul

6:30 am - 6:14 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

18h 44m2 stops Amsterdam Schiphol Salt Lake City

$924KLM

Wed, Apr 14 - Wed, Apr 21

1:56 pm - 12:20 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

15h 24m1 stop Seattle/Tacoma Intl

2:45 pm - 10:52 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

15h 07m1 stop Seattle/Tacoma Intl

$986Alaska Airlines

Mon, Jan 11 - Wed, Jan 27

1:10 pm - 5:00 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

20h 50m2 stops Salt Lake City Amsterdam Schiphol

5:50 pm - 6:19 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

31h 29m2 stops Amsterdam Schiphol Salt Lake City

$998KLM

Mon, Jan 11 - Wed, Jan 27

2:40 pm - 9:40 amIDA Idaho Falls Fanning Field-LHR London Heathrow

12h 00m1 stop Denver Intl

3:00 pm - 1:37 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

29h 37m2 stops Toronto Pearson Intl Denver Intl

$1,011United Airlines

Tue, Dec 1 - Sun, Dec 6

2:40 pm - 9:40 amIDA Idaho Falls Fanning Field-LHR London Heathrow

12h 00m1 stop Denver Intl

3:00 pm - 1:37 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

29h 37m2 stops Toronto Pearson Intl Denver Intl

$1,012United Airlines

Tue, Dec 1 - Sun, Dec 6

4:10 pm - 7:40 amIDA Idaho Falls Fanning Field-LHR London Heathrow

32h 30m2 stops Denver Intl Houston George Bush Intcntl

11:10 am - 1:37 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

33h 27m2 stops Toronto Pearson Intl Denver Intl

$1,016United Airlines

Tue, Dec 1 - Sun, Dec 6

1:09 pm - 10:40 amIDA Idaho Falls Fanning Field-LHR London Heathrow

38h 31m2 stops Salt Lake City Seattle/Tacoma Intl

3:35 pm - 12:28 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

27h 53m2 stops Miami Salt Lake City

$1,278Delta

Wed, Dec 23 - Tue, Dec 29

6:53 pm - 10:40 amIDA Idaho Falls Fanning Field-LHR London Heathrow

32h 47m2 stops Salt Lake City Seattle/Tacoma Intl

3:35 pm - 12:28 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

27h 53m2 stops Miami Salt Lake City

$1,278Delta

Wed, Dec 23 - Wed, Dec 30

Cheap last minute flights

Enter your travel dates to find the best prices.

2:35 pm - 9:40 amIDA Idaho Falls Fanning Field-LHR London Heathrow

12h 05m1 stop Denver Intl

7:30 am - 9:09 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

20h 39m2 stops Frankfurt am Main Denver Intl

$1,413United Airlines

Wed, Nov 4 - Fri, Nov 6

7:00 am - 9:40 amIDA Idaho Falls Fanning Field-LHR London Heathrow

19h 40m1 stop Denver Intl

9:30 am - 9:09 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

18h 39m2 stops Frankfurt am Main Denver Intl

$1,413United Airlines

Tue, Nov 3 - Thu, Nov 5

7:00 am - 10:50 amIDA Idaho Falls Fanning Field-LHR London Heathrow

20h 50m2 stops Denver Intl Washington, D.C. Dulles Intl

7:30 am - 9:09 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

20h 39m2 stops Frankfurt am Main Denver Intl

$1,418United Airlines

Wed, Nov 4 - Fri, Nov 6

4:30 pm - 8:35 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

21h 05m2 stops Denver Intl Newark

9:30 am - 9:09 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

18h 39m2 stops Frankfurt am Main Denver Intl

$1,418United Airlines

Tue, Nov 3 - Thu, Nov 5

2:35 pm - 9:40 amIDA Idaho Falls Fanning Field-LHR London Heathrow

12h 05m1 stop Denver Intl

11:10 am - 9:53 amLHR London Heathrow-IDA Idaho Falls Fanning Field

29h 43m2 stops Munich Franz Josef Strauss Denver Intl

$1,472United Airlines

Tue, Nov 3 - Fri, Nov 6

1:53 pm - 12:20 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

15h 27m1 stop Seattle/Tacoma Intl

2:45 pm - 10:54 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

15h 09m1 stop Seattle/Tacoma Intl

$1,476Alaska Airlines

Tue, Nov 3 - Fri, Nov 6

1:53 pm - 12:20 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

15h 27m1 stop Seattle/Tacoma Intl

2:45 pm - 10:54 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

15h 09m1 stop Seattle/Tacoma Intl

$1,476Alaska Airlines

Tue, Nov 3 - Thu, Nov 5

1:53 pm - 12:20 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

15h 27m1 stop Seattle/Tacoma Intl

2:45 pm - 10:54 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

15h 09m1 stop Seattle/Tacoma Intl

$1,476Alaska Airlines

Wed, Nov 4 - Fri, Nov 6

6:04 am - 12:20 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

23h 16m1 stop Seattle/Tacoma Intl

2:45 pm - 10:54 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

15h 09m1 stop Seattle/Tacoma Intl

$1,476Alaska Airlines

Tue, Nov 3 - Wed, Nov 4

6:04 am - 12:20 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

23h 16m1 stop Seattle/Tacoma Intl

2:45 pm - 10:54 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

15h 09m1 stop Seattle/Tacoma Intl

$1,476Alaska Airlines

Wed, Nov 4 - Thu, Nov 5

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Alaska Airlines flights from Idaho Falls to London

Our best Alaska Airlines deals on Idaho Falls to London flight tickets

Alaska Airlines

Apr 14

IDA4:03 pmIdaho Falls Fanning Field

16h 02m

1 stop

LHR3:05 pmLondon Heathrow

Apr 21

LHR5:00 pmLondon Heathrow

29h 29m

1 stop

IDA3:29 pmIdaho Falls Fanning Field

$905

Alaska Airlines

Jan 11

IDA1:56 pmIdaho Falls Fanning Field

15h 24m

1 stop

LHR12:20 pmLondon Heathrow

Jan 27

LHR2:45 pmLondon Heathrow

15h 07m

1 stop

IDA10:52 pmIdaho Falls Fanning Field

$986

Alaska Airlines

Jan 25

IDA1:56 pmIdaho Falls Fanning Field

15h 24m

1 stop

LHR12:20 pmLondon Heathrow

Jan 28

LHR2:45 pmLondon Heathrow

15h 07m

1 stop

IDA10:52 pmIdaho Falls Fanning Field

$1,386

KLM flights from Idaho Falls to London

Our best KLM deals on Idaho Falls to London flight tickets

KLM

Apr 14

IDA1:10 pmIdaho Falls Fanning Field

16h 55m

2 stops

LHR1:05 pmLondon Heathrow

Apr 21

LHR6:30 amLondon Heathrow

18h 44m

2 stops

IDA6:14 pmIdaho Falls Fanning Field

$924

KLM

Jan 11

IDA1:10 pmIdaho Falls Fanning Field

20h 50m

2 stops

LHR5:00 pmLondon Heathrow

Jan 27

LHR5:50 pmLondon Heathrow

31h 29m

2 stops

IDA6:19 pmIdaho Falls Fanning Field

$998

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Wed 4/14

4:03 pm-3:05 pm

1 stop16h 02m

London Heathrow

Wed 4/21

5:00 pm-3:29 pm

1 stop29h 29m

$905

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Wed 4/14

1:10 pm-10:00 am

1 stop13h 50m

London Heathrow

Wed 4/21

8:40 am-10:19 pm

2 stops20h 39m

$920

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Wed 4/14

1:10 pm-1:05 pm

2 stops16h 55m

London Heathrow

Wed 4/21

6:30 am-6:14 pm

2 stops18h 44m

$924

Quickest round-trip

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Mon 1/11

1:56 pm-12:20 pm

1 stop15h 24m

London Heathrow

Wed 1/27

2:45 pm-10:52 pm

1 stop15h 07m

$986

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Mon 1/11

1:10 pm-5:00 pm

2 stops20h 50m

London Heathrow

Wed 1/27

5:50 pm-6:19 pm

2 stops31h 29m

$998

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Tue 12/1

2:40 pm-9:40 am

1 stop12h 00m

London Heathrow

Sun 12/6

3:00 pm-1:37 pm

2 stops29h 37m

$1,011

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Tue 12/1

2:40 pm-9:40 am

1 stop12h 00m

London Heathrow

Sun 12/6

3:00 pm-1:37 pm

2 stops29h 37m

$1,012

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Tue 12/1

4:10 pm-7:40 am

2 stops32h 30m

London Heathrow

Sun 12/6

11:10 am-1:37 pm

2 stops33h 27m

$1,016

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Wed 12/23

1:09 pm-10:40 am

2 stops38h 31m

London Heathrow

Tue 12/29

3:35 pm-12:28 pm

2 stops27h 53m

$1,278

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Wed 12/23

6:53 pm-10:40 am

2 stops32h 47m

London Heathrow

Wed 12/30

3:35 pm-12:28 pm

2 stops27h 53m

$1,278

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from Idaho Falls to London

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

Can stopping save me money on Idaho Falls to London flights?

You could potentially save up to 21% on your flight if you consider stops on a Idaho Falls to London flight.

When to book flights from Idaho Falls to London

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

Estimated round-trip price

Cheap Idaho Falls to London (IDA to LON) flight deals and tips

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

Best Price Found	$555
Fastest flight time	12h 00m
Direct flights	None

The best one-way flight to London from Idaho Falls in the past 72 hours is $555. The best round-trip flight deal from Idaho Falls to London found on momondo in the last 72 hours is $905.

The fastest flight from Idaho Falls to London takes 12h 00m

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

Search flight deals

Frequently asked questions about flying from Idaho Falls to London

How far is Idaho Falls Fanning Field to London by plane?
A flight from Idaho Falls Fanning Field to London will travel around 4715.6 mi. Flights usually cover this in 12h 00m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Idaho Falls Fanning Field Airport to London?
Prices for flights from Idaho Falls Fanning Field Airport to London are updated daily.
How many operators does momondo search for flights from Idaho Falls Fanning Field Airport to London?
The number of operators available for flights from Idaho Falls Fanning Field Airport to London is 1 as of November 2026.
How old do you have to be to fly from Idaho Falls Fanning Field Airport to London?
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 Idaho Falls Fanning Field Airport to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Idaho Falls to London?
momondo data reveals that the most frequently booked airline on the route from Idaho Falls to London is United Airlines, representing 100% of all bookings.

Best airlines flying from Idaho Falls to London

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $963	Free Cancellation	Rating 7.8 8,696 reviews		Search Delta flights

Hounslow

Gatwick

Croydon

Hayes

Milton Keynes

Luton

Stansted

Kingston upon Thames

Watford

Richmond

Dover

Wembley

Crawley

Worthing

Harrow

Brentford

Canterbury

Hook

Dunstable

Eastbourne

Why use momondo?

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

It is quick and easy to find Idaho Falls 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 Falls to London with flexible booking policies on momondo?

Flights from Idaho Falls to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between Idaho Falls and London 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 Idaho Falls to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Idaho Falls are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from Idaho Falls to London from $555

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 Falls to London departing on 11/13. 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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Alaska Airlines flights from Idaho Falls to London

Our best Alaska Airlines deals on Idaho Falls to London flight tickets

KLM flights from Idaho Falls to London

Our best KLM deals on Idaho Falls to London flight tickets

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

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How to get the cheapest flight ticket from Idaho Falls to London

Can stopping save me money on Idaho Falls to London flights?

What is the cheapest airline that flies from Idaho Falls Fanning Field to London?

When to book flights from Idaho Falls to London

Cheap Idaho Falls to London (IDA to LON) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Idaho Falls to London

Best airlines flying from Idaho Falls to London

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

Traveling to a place near London?

Why use momondo?

An easier way to manage your London 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

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London

Fly your favorite airline to London

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

Cabin classes currently available on flights to London

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

Popular cities in the United Kingdom

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

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