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Cheap flights from London to Idaho Falls from £792

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London to Idaho Falls departing on 3/12. 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
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Find the cheapest flights from London to Idaho Falls

Cheap return flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
14:45 - 22:39
LHR
-
IDA
14h 54m
1 stop
Alaska Airlines Logo
06:15 - 12:20
IDA
-
LHR
23h 05m
1 stop
£792Alaska Airlines
Thu, 3 Dec - Mon, 7 Dec
Alaska Airlines Logo
14:45 - 22:39
LHR
-
IDA
14h 54m
1 stop
Alaska Airlines Logo
06:15 - 12:20
IDA
-
LHR
23h 05m
1 stop
£794Alaska Airlines
Thu, 3 Dec - Mon, 7 Dec
Alaska Airlines Logo
14:45 - 22:39
LHR
-
IDA
14h 54m
1 stop
Alaska Airlines Logo
06:15 - 12:20
IDA
-
LHR
23h 05m
1 stop
£794Alaska Airlines
Thu, 3 Dec - Mon, 7 Dec
Finnair Logo
13:15 - 13:09
LHR
-
IDA
30h 54m
2 stops
Finnair Logo
14:08 - 06:20
IDA
-
LHR
33h 12m
1 stop
£818Finnair
Tue, 1 Sep - Fri, 25 Sep
Virgin Atlantic Logo
09:20 - 22:32
LHR
-
IDA
20h 12m
2 stops
Virgin Atlantic Logo
13:05 - 10:00
IDA
-
LHR
13h 55m
1 stop
£821Virgin Atlantic
Tue, 1 Sep - Fri, 25 Sep
Virgin Atlantic Logo
09:20 - 22:32
LHR
-
IDA
20h 12m
2 stops
Virgin Atlantic Logo
13:05 - 10:00
IDA
-
LHR
13h 55m
1 stop
£823Virgin Atlantic
Tue, 1 Sep - Fri, 25 Sep
Virgin Atlantic Logo
10:55 - 18:20
LHR
-
IDA
14h 25m
1 stop
Virgin Atlantic Logo
13:05 - 10:00
IDA
-
LHR
13h 55m
1 stop
£825Virgin Atlantic
Tue, 1 Sep - Fri, 25 Sep
Delta Logo
06:30 - 18:20
LHR
-
IDA
18h 50m
2 stops
Delta Logo
13:05 - 10:00
IDA
-
LHR
13h 55m
1 stop
£835Delta
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
13:00 - 22:56
LGW
-
IDA
16h 56m
2 stops
Multiple Airlines Logo
06:18 - 14:40
IDA
-
LGW
25h 22m
2 stops
£920Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
15:40 - 22:56
LGW
-
IDA
38h 16m
2 stops
Multiple Airlines Logo
06:18 - 14:40
IDA
-
LGW
25h 22m
2 stops
£936Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep

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Finnair flights from London to Idaho Falls

Our best Finnair deals on London to Idaho Falls flight tickets
Finnair
1 Sept
LHR13:15London Heathrow
30h 54m
2 stops
IDA13:09Idaho Falls Fanning Field
25 Sept
IDA14:08Idaho Falls Fanning Field
33h 12m
1 stop
LHR06:20London Heathrow
£818
Finnair
1 Sept
LHR10:30London Heathrow
17h 50m
2 stops
IDA21:20Idaho Falls Fanning Field
25 Sept
IDA12:15Idaho Falls Fanning Field
17h 00m
2 stops
LHR12:15London Heathrow
£839
Finnair
1 Sept
LHR10:30London Heathrow
17h 50m
2 stops
IDA21:20Idaho Falls Fanning Field
25 Sept
IDA07:00Idaho Falls Fanning Field
17h 20m
2 stops
LHR07:20London Heathrow
£840

Virgin Atlantic flights from London to Idaho Falls

Our best Virgin Atlantic deals on London to Idaho Falls flight tickets
Virgin Atlantic
1 Sept
LHR09:20London Heathrow
20h 12m
2 stops
IDA22:32Idaho Falls Fanning Field
25 Sept
IDA13:05Idaho Falls Fanning Field
13h 55m
1 stop
LHR10:00London Heathrow
£821
Virgin Atlantic
1 Sept
LHR09:20London Heathrow
20h 12m
2 stops
IDA22:32Idaho Falls Fanning Field
25 Sept
IDA13:05Idaho Falls Fanning Field
13h 55m
1 stop
LHR10:00London Heathrow
£823
Virgin Atlantic
1 Sept
LHR10:55London Heathrow
14h 25m
1 stop
IDA18:20Idaho Falls Fanning Field
25 Sept
IDA13:05Idaho Falls Fanning Field
13h 55m
1 stop
LHR10:00London Heathrow
£825

momondo Fare Finder

 
Customise your flight search to find flights from London 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 1 July 2026.
Use the filters below to find and compare flights from London to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 3/12

14:45-22:39

1 stop14h 54m

Idaho Falls Fanning Field

Mon 7/12

06:15-12:20

1 stop23h 05m

£792

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 3/12

14:45-22:39

1 stop14h 54m

Idaho Falls Fanning Field

Mon 7/12

06:15-12:20

1 stop23h 05m

£794

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 3/12

14:45-22:39

1 stop14h 54m

Idaho Falls Fanning Field

Mon 7/12

06:15-12:20

1 stop23h 05m

£794

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

13:15-13:09

2 stops30h 54m

Idaho Falls Fanning Field

Fri 25/9

14:08-06:20

1 stop33h 12m

£818

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

09:20-22:32

2 stops20h 12m

Idaho Falls Fanning Field

Fri 25/9

13:05-10:00

1 stop13h 55m

£821

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

09:20-22:32

2 stops20h 12m

Idaho Falls Fanning Field

Fri 25/9

13:05-10:00

1 stop13h 55m

£823
Fastest return journey

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

10:55-18:20

1 stop14h 25m

Idaho Falls Fanning Field

Fri 25/9

13:05-10:00

1 stop13h 55m

£825

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

06:30-18:20

2 stops18h 50m

Idaho Falls Fanning Field

Fri 25/9

13:05-10:00

1 stop13h 55m

£835

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Tue 1/9

13:00-22:56

2 stops16h 56m

Idaho Falls Fanning Field

Fri 25/9

06:18-14:40

2 stops25h 22m

£920

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Tue 1/9

15:40-22:56

2 stops38h 16m

Idaho Falls Fanning Field

Fri 25/9

06:18-14:40

2 stops25h 22m

£936

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from London to Idaho Falls

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

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

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

Fastest flight time

17h 46m

Direct flights

None
The fastest flight from London to Idaho Falls takes 17h 46m
There are no direct flights from London to Idaho Falls. There are no popular flight routes from London to Idaho Falls.
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Frequently asked questions about flying from London to Idaho Falls

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

    The distance between London and Idaho Falls Fanning Field is about 4715.6 mi. By plane, this route typically takes 17h 46m.

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

    Prices for flights from London to Idaho Falls Fanning Field Airport are refreshed on a daily basis.

  • How old do you have to be to fly from London to Idaho Falls Fanning Field 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 London 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 required for your trip to Idaho Falls Fanning Field 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 Idaho Falls Fanning Field Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Frequently asked questions about flying from London to Idaho Falls

  • How do I get Price Alerts for flights from London to Idaho Falls?

    Confirm your travel details to search for the latest offers for flights from London to Idaho Falls. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from London to Idaho Falls with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Why use momondo?

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

It is quick and easy to find London to Idaho Falls 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 Idaho Falls that suits you.

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

Flights from London to Idaho Falls 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 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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