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Cheap flights from London Heathrow Airport to Idaho Falls from £478

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Idaho Falls departing on 9/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from London Heathrow Airport to Idaho Falls

Cheap return flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
17:00 - 15:20LHR  London Heathrow-IDA Idaho Falls Fanning Field
29h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
06:18 - 15:05IDA  Idaho Falls Fanning Field-LHR London Heathrow
25h 47m1 stop Seattle/Tacoma Intl
£770Alaska Airlines
Tue, 8 Sep - Tue, 15 Sep
Virgin Atlantic Logo
17:10 - 18:17LHR  London Heathrow-IDA Idaho Falls Fanning Field
32h 07m2 stops Amsterdam Schiphol Salt Lake City
Virgin Atlantic Logo
13:05 - 15:35IDA  Idaho Falls Fanning Field-LHR London Heathrow
19h 30m2 stops Salt Lake City Seattle/Tacoma Intl
£790Virgin Atlantic
Tue, 8 Sep - Tue, 15 Sep
Finnair Logo
16:25 - 11:45LHR  London Heathrow-IDA Idaho Falls Fanning Field
26h 20m1 stop Dallas/Fort Worth
Finnair Logo
07:00 - 10:15IDA  Idaho Falls Fanning Field-LHR London Heathrow
20h 15m2 stops Dallas/Fort Worth Toronto Pearson Intl
£790Finnair
Tue, 8 Sep - Tue, 15 Sep
Alaska Airlines Logo
14:45 - 22:54LHR  London Heathrow-IDA Idaho Falls Fanning Field
15h 09m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
13:53 - 12:20IDA  Idaho Falls Fanning Field-LHR London Heathrow
15h 27m1 stop Seattle/Tacoma Intl
£801Alaska Airlines
Thu, 5 Nov - Mon, 9 Nov
Alaska Airlines Logo
14:45 - 15:18LHR  London Heathrow-IDA Idaho Falls Fanning Field
31h 33m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
06:04 - 12:20IDA  Idaho Falls Fanning Field-LHR London Heathrow
23h 16m1 stop Seattle/Tacoma Intl
£802Alaska Airlines
Wed, 4 Nov - Sun, 8 Nov
Alaska Airlines Logo
14:45 - 22:54LHR  London Heathrow-IDA Idaho Falls Fanning Field
15h 09m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
13:53 - 12:20IDA  Idaho Falls Fanning Field-LHR London Heathrow
15h 27m1 stop Seattle/Tacoma Intl
£802Alaska Airlines
Thu, 5 Nov - Mon, 9 Nov
Alaska Airlines Logo
14:45 - 22:54LHR  London Heathrow-IDA Idaho Falls Fanning Field
15h 09m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
13:53 - 12:20IDA  Idaho Falls Fanning Field-LHR London Heathrow
15h 27m1 stop Seattle/Tacoma Intl
£803Alaska Airlines
Thu, 5 Nov - Mon, 9 Nov
Alaska Airlines Logo
17:00 - 15:20LHR  London Heathrow-IDA Idaho Falls Fanning Field
29h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
06:18 - 15:05IDA  Idaho Falls Fanning Field-LHR London Heathrow
25h 47m1 stop Seattle/Tacoma Intl
£816Alaska Airlines
Thu, 24 Sep - Thu, 1 Oct
United Airlines Logo
07:30 - 21:09LHR  London Heathrow-IDA Idaho Falls Fanning Field
20h 39m2 stops Frankfurt am Main Denver Intl
United Airlines Logo
17:40 - 20:35IDA  Idaho Falls Fanning Field-LHR London Heathrow
19h 55m2 stops Denver Intl Newark
£931United Airlines
Wed, 4 Nov - Sun, 8 Nov
United Airlines Logo
07:30 - 21:09LHR  London Heathrow-IDA Idaho Falls Fanning Field
20h 39m2 stops Frankfurt am Main Denver Intl
United Airlines Logo
17:40 - 09:40IDA  Idaho Falls Fanning Field-LHR London Heathrow
33h 00m1 stop Denver Intl
£931United Airlines
Wed, 4 Nov - Sun, 8 Nov

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Alaska Airlines flights from London Heathrow Airport to Idaho Falls

Our best Alaska Airlines deals on London Heathrow Airport to Idaho Falls flight tickets
Alaska Airlines
8 Sept
LHR17:00London Heathrow
29h 20m
1 stop
IDA15:20Idaho Falls Fanning Field
15 Sept
IDA06:18Idaho Falls Fanning Field
25h 47m
1 stop
LHR15:05London Heathrow
£770
Alaska Airlines
5 Nov
LHR14:45London Heathrow
15h 09m
1 stop
IDA22:54Idaho Falls Fanning Field
9 Nov
IDA13:53Idaho Falls Fanning Field
15h 27m
1 stop
LHR12:20London Heathrow
£801
Alaska Airlines
4 Nov
LHR14:45London Heathrow
31h 33m
1 stop
IDA15:18Idaho Falls Fanning Field
8 Nov
IDA06:04Idaho Falls Fanning Field
23h 16m
1 stop
LHR12:20London Heathrow
£802

United Airlines flights from London Heathrow Airport to Idaho Falls

Our best United Airlines deals on London Heathrow Airport to Idaho Falls flight tickets
United Airlines
4 Nov
LHR07:30London Heathrow
20h 39m
2 stops
IDA21:09Idaho Falls Fanning Field
8 Nov
IDA17:40Idaho Falls Fanning Field
19h 55m
2 stops
LHR20:35London Heathrow
£931
United Airlines
5 Nov
LHR07:30London Heathrow
20h 39m
2 stops
IDA21:09Idaho Falls Fanning Field
9 Nov
IDA14:35Idaho Falls Fanning Field
12h 05m
1 stop
LHR09:40London Heathrow
£960
United Airlines
24 Sept
LHR07:30London Heathrow
16h 46m
2 stops
IDA17:16Idaho Falls Fanning Field
1 Oct
IDA14:28Idaho Falls Fanning Field
12h 12m
1 stop
LHR09:40London Heathrow
£960

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to Idaho Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 15 August 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Tue 8/9

17:00-15:20

1 stop29h 20m

Idaho Falls Fanning Field

Tue 15/9

06:18-15:05

1 stop25h 47m

£770

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Tue 8/9

17:10-18:17

2 stops32h 07m

Idaho Falls Fanning Field

Tue 15/9

13:05-15:35

2 stops19h 30m

£790

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Tue 8/9

16:25-11:45

1 stop26h 20m

Idaho Falls Fanning Field

Tue 15/9

07:00-10:15

2 stops20h 15m

£790
Fastest return journey

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 5/11

14:45-22:54

1 stop15h 09m

Idaho Falls Fanning Field

Mon 9/11

13:53-12:20

1 stop15h 27m

£801

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Wed 4/11

14:45-15:18

1 stop31h 33m

Idaho Falls Fanning Field

Sun 8/11

06:04-12:20

1 stop23h 16m

£802

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 5/11

14:45-22:54

1 stop15h 09m

Idaho Falls Fanning Field

Mon 9/11

13:53-12:20

1 stop15h 27m

£802

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 5/11

14:45-22:54

1 stop15h 09m

Idaho Falls Fanning Field

Mon 9/11

13:53-12:20

1 stop15h 27m

£803

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 24/9

17:00-15:20

1 stop29h 20m

Idaho Falls Fanning Field

Thu 1/10

06:18-15:05

1 stop25h 47m

£816

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Wed 4/11

07:30-21:09

2 stops20h 39m

Idaho Falls Fanning Field

Sun 8/11

17:40-20:35

2 stops19h 55m

£931

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Wed 4/11

07:30-21:09

2 stops20h 39m

Idaho Falls Fanning Field

Sun 8/11

17:40-09:40

1 stop33h 00m

£931

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Idaho Falls from

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

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 cheapest airline that flies from London Heathrow to Idaho Falls Fanning Field?

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

When to book flights from London Heathrow Airport to Idaho Falls

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

Cheap London Heathrow Airport to Idaho Falls (LHR to IDA) flight deals and tips

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

Fastest flight time

20h 12m

Direct flights

None
The fastest flight from London Heathrow Airport to Idaho Falls takes 20h 12m
There are no direct flights from London Heathrow Airport to Idaho Falls. There are no popular flight routes from London Heathrow Airport to Idaho Falls.
Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Idaho Falls

  • How far is London Heathrow to Idaho Falls Fanning Field by plane?

    There are 4706.6 mi between London Heathrow and Idaho Falls Fanning Field. Typically, this will take 20h 12m by plane in normal conditions.

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

    Prices for flights from London Heathrow Airport to Idaho Falls Fanning Field Airport were last updated today.

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

  • How old do you have to be to fly from London Heathrow Airport to Idaho Falls Fanning Field 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 London Heathrow Airport to Idaho Falls Fanning Field Airport.

  • What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

    The travel and health documents you'll need for your trip to Idaho Falls Fanning Field Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho Falls Fanning Field Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from London Heathrow Airport to Idaho Falls?

Best airlines flying from London Heathrow Airport to Idaho Falls

Compare and see reviews for airlines that fly from London Heathrow Airport to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom £1,030Free CancellationRating
7.4
10,111 reviews
Search United Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Idaho Falls from London.

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

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

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

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

If you are simply researching potential flights to Idaho Falls, momondo offers a useful price alert feature which will track prices for flights to Idaho Falls from London and alert you when they change.

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