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

Virgin Atlantic, Brussels Airlines, and United Airlines 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 September 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.

$461 Cheap Flights from Idaho Falls to London in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Idaho Falls to London

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

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

12h 00m1 stop Denver Intl

6:35 am - 9:28 amLHR London Heathrow-IDA Idaho Falls Fanning Field

33h 53m2 stops Munich Franz Josef Strauss Denver Intl

$824United Airlines

Mon, Dec 7 - Wed, Dec 9

10:45 am - 9:40 amIDA Idaho Falls Fanning Field-LHR London Heathrow

15h 55m1 stop Denver Intl

6:35 am - 3:29 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

39h 54m2 stops Munich Franz Josef Strauss Denver Intl

$825United Airlines

Mon, Dec 7 - Wed, Dec 9

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

12h 00m1 stop Denver Intl

6:35 am - 9:28 amLHR London Heathrow-IDA Idaho Falls Fanning Field

33h 53m2 stops Munich Franz Josef Strauss Denver Intl

$825United Airlines

Mon, Dec 7 - Wed, Dec 9

4:10 pm - 8:35 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

21h 25m2 stops Denver Intl Newark

4:40 pm - 9:28 amLHR London Heathrow-IDA Idaho Falls Fanning Field

47h 48m2 stops Munich Franz Josef Strauss Denver Intl

$829United Airlines

Mon, Dec 7 - Wed, Dec 9

2:40 pm - 9:20 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

23h 40m2 stops Denver Intl Newark

11:10 am - 3:29 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

35h 19m2 stops Munich Franz Josef Strauss Denver Intl

$829United Airlines

Mon, Dec 7 - Wed, Dec 9

1:05 pm - 11:00 amIDA Idaho Falls Fanning Field-LHR London Heathrow

14h 55m1 stop Salt Lake City

6:15 am - 10:10 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

22h 55m2 stops Paris Charles de Gaulle Salt Lake City

$915Delta

Tue, Sep 29 - Fri, Oct 9

6:56 pm - 8:10 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

18h 14m2 stops Salt Lake City New York John F Kennedy Intl

6:20 am - 10:10 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

21h 50m2 stops Paris Charles de Gaulle Salt Lake City

$919Delta

Mon, Oct 19 - Fri, Oct 30

6:00 am - 10:20 amIDA Idaho Falls Fanning Field-LHR London Heathrow

21h 20m2 stops Salt Lake City Minneapolis St Paul

3:50 pm - 12:22 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

27h 32m2 stops New York John F Kennedy Intl Salt Lake City

$971Delta

Wed, Oct 7 - Tue, Oct 13

6:00 am - 10:20 amIDA Idaho Falls Fanning Field-LHR London Heathrow

21h 20m2 stops Salt Lake City Minneapolis St Paul

3:50 pm - 12:22 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

27h 32m2 stops New York John F Kennedy Intl Salt Lake City

$972Delta

Wed, Oct 7 - Tue, Oct 13

6:00 am - 10:20 amIDA Idaho Falls Fanning Field-LHR London Heathrow

21h 20m2 stops Salt Lake City Minneapolis St Paul

3:50 pm - 12:22 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

27h 32m2 stops New York John F Kennedy Intl Salt Lake City

$973Delta

Wed, Oct 7 - Tue, Oct 13

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United Airlines flights from Idaho Falls to London

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

United Airlines

Dec 7

IDA2:40 pmIdaho Falls Fanning Field

12h 00m

1 stop

LHR9:40 amLondon Heathrow

Dec 9

LHR6:35 amLondon Heathrow

33h 53m

2 stops

IDA9:28 amIdaho Falls Fanning Field

$824

United Airlines

Dec 7

IDA10:45 amIdaho Falls Fanning Field

15h 55m

1 stop

LHR9:40 amLondon Heathrow

Dec 9

LHR6:35 amLondon Heathrow

39h 54m

2 stops

IDA3:29 pmIdaho Falls Fanning Field

$825

United Airlines

Dec 7

IDA2:40 pmIdaho Falls Fanning Field

23h 40m

2 stops

LHR9:20 pmLondon Heathrow

Dec 9

LHR11:10 amLondon Heathrow

35h 19m

2 stops

IDA3:29 pmIdaho Falls Fanning Field

$829

Alaska Airlines flights from Idaho Falls to London

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

Alaska Airlines

Dec 7

IDA4:03 pmIdaho Falls Fanning Field

13h 17m

1 stop

LHR12:20 pmLondon Heathrow

Dec 9

LHR2:45 pmLondon Heathrow

14h 54m

1 stop

IDA10:39 pmIdaho Falls Fanning Field

$889

Alaska Airlines

Dec 7

IDA6:15 amIdaho Falls Fanning Field

23h 05m

1 stop

LHR12:20 pmLondon Heathrow

Dec 9

LHR2:45 pmLondon Heathrow

14h 54m

1 stop

IDA10:39 pmIdaho Falls Fanning Field

$890

Alaska Airlines

Dec 7

IDA4:03 pmIdaho Falls Fanning Field

13h 17m

1 stop

LHR12:20 pmLondon Heathrow

Dec 9

LHR2:45 pmLondon Heathrow

14h 54m

1 stop

IDA10:39 pmIdaho Falls Fanning Field

$891

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

Mon 12/7

2:40 pm-9:40 am

1 stop12h 00m

London Heathrow

Wed 12/9

6:35 am-9:28 am

2 stops33h 53m

$824

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Mon 12/7

10:45 am-9:40 am

1 stop15h 55m

London Heathrow

Wed 12/9

6:35 am-3:29 pm

2 stops39h 54m

$825

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Mon 12/7

2:40 pm-9:40 am

1 stop12h 00m

London Heathrow

Wed 12/9

6:35 am-9:28 am

2 stops33h 53m

$825

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Mon 12/7

4:10 pm-8:35 pm

2 stops21h 25m

London Heathrow

Wed 12/9

4:40 pm-9:28 am

2 stops47h 48m

$829

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Mon 12/7

2:40 pm-9:20 pm

2 stops23h 40m

London Heathrow

Wed 12/9

11:10 am-3:29 pm

2 stops35h 19m

$829

Quickest round-trip

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Tue 9/29

1:05 pm-11:00 am

1 stop14h 55m

London Heathrow

Fri 10/9

6:15 am-10:10 pm

2 stops22h 55m

$915

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Mon 10/19

6:56 pm-8:10 pm

2 stops18h 14m

London Heathrow

Fri 10/30

6:20 am-10:10 pm

2 stops21h 50m

$919

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Wed 10/7

6:00 am-10:20 am

2 stops21h 20m

London Heathrow

Tue 10/13

3:50 pm-12:22 pm

2 stops27h 32m

$971

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Wed 10/7

6:00 am-10:20 am

2 stops21h 20m

London Heathrow

Tue 10/13

3:50 pm-12:22 pm

2 stops27h 32m

$972

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Wed 10/7

6:00 am-10:20 am

2 stops21h 20m

London Heathrow

Tue 10/13

3:50 pm-12:22 pm

2 stops27h 32m

$973

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 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 42% 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	$461
Fastest flight time	12h 00m
Direct flights	None

The best one-way flight to London from Idaho Falls in the past 72 hours is $461. The best round-trip flight deal from Idaho Falls to London found on momondo in the last 72 hours is $824.

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 September 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 $691	Free Cancellation	Rating 7.8 8,538 reviews		Search Delta flights

Hounslow

Gatwick

Milton Keynes

Hayes

Wembley

Luton

Croydon

Dover

Richmond

Stansted

Kingston upon Thames

Harrow

Cobham

Watford

Slough

Eastbourne

Worthing

Hook

Uxbridge

Romford

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 $461

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 10/7. 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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United Airlines flights from Idaho Falls to London

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

Alaska Airlines flights from Idaho Falls to London

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

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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.

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