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Cheap flights from London to Idaho Falls from £823

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 1/9. 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.
American Airlines Logo
08:55 - 21:20
LHR
-
IDA
19h 25m
1 stop
American Airlines Logo
12:15 - 10:55
IDA
-
LHR
15h 40m
1 stop
£823American Airlines
Tue, 1 Sep - Fri, 25 Sep
American Airlines Logo
08:55 - 21:20
LHR
-
IDA
19h 25m
1 stop
American Airlines Logo
12:15 - 10:55
IDA
-
LHR
15h 40m
1 stop
£825American Airlines
Tue, 1 Sep - Fri, 25 Sep
American Airlines Logo
10:05 - 21:20
LHR
-
IDA
18h 15m
2 stops
American Airlines Logo
12:15 - 10:55
IDA
-
LHR
15h 40m
1 stop
£827American Airlines
Tue, 1 Sep - Fri, 25 Sep
American Airlines Logo
10:05 - 21:20
LHR
-
IDA
18h 15m
1 stop
American Airlines Logo
12:15 - 09:05
IDA
-
LHR
13h 50m
1 stop
£828American Airlines
Tue, 1 Sep - Fri, 25 Sep
Icelandair Logo
13:05 - 22:56
LHR
-
IDA
40h 51m
2 stops
Icelandair Logo
06:18 - 11:55
IDA
-
LHR
22h 37m
2 stops
£832Icelandair
Tue, 1 Sep - Fri, 25 Sep
Delta Logo
06:15 - 18:20
LHR
-
IDA
19h 05m
2 stops
Delta Logo
13:04 - 13:05
IDA
-
LHR
17h 01m
2 stops
£840Delta
Tue, 1 Sep - Fri, 25 Sep
Delta Logo
06:15 - 18:20
LHR
-
IDA
19h 05m
2 stops
Delta Logo
13:04 - 13:05
IDA
-
LHR
17h 01m
2 stops
£845Delta
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
£866Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
13:00 - 22:56
LGW
-
IDA
40h 56m
2 stops
Multiple Airlines Logo
06:18 - 14:40
IDA
-
LGW
25h 22m
2 stops
£867Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Icelandair Logo
13:00 - 22:56
LGW
-
IDA
16h 56m
2 stops
Icelandair Logo
14:01 - 14:40
IDA
-
LGW
17h 39m
2 stops
£914Icelandair
Tue, 1 Sep - Fri, 25 Sep

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Virgin Atlantic flights from London to Idaho Falls

Our best Virgin Atlantic deals on London to Idaho Falls flight tickets
Virgin Atlantic
26 Aug
LHR10:55London Heathrow
18h 37m
1 stop
IDA22:32Idaho Falls Fanning Field
31 Aug
IDA15:17Idaho Falls Fanning Field
17h 18m
2 stops
LHR15:35London Heathrow
£890
Virgin Atlantic
26 Jun
LHR16:20London Heathrow
33h 01m
2 stops
IDA18:21Idaho Falls Fanning Field
18 Jul
IDA11:25Idaho Falls Fanning Field
18h 40m
2 stops
LHR13:05London Heathrow
£933

Alaska Airlines flights from London to Idaho Falls

Our best Alaska Airlines deals on London to Idaho Falls flight tickets
Alaska Airlines
26 Aug
LHR17:00London Heathrow
29h 20m
1 stop
IDA15:20Idaho Falls Fanning Field
31 Aug
IDA06:18Idaho Falls Fanning Field
25h 47m
1 stop
LHR15:05London Heathrow
£957
Alaska Airlines
23 Jul
LHR17:00London Heathrow
29h 37m
1 stop
IDA15:37Idaho Falls Fanning Field
31 Jul
IDA07:15Idaho Falls Fanning Field
24h 50m
1 stop
LHR15:05London Heathrow
£1,022
Alaska Airlines
23 Jul
LHR17:00London Heathrow
27h 06m
2 stops
IDA13:06Idaho Falls Fanning Field
31 Jul
IDA16:14Idaho Falls Fanning Field
15h 51m
2 stops
LHR15:05London Heathrow
£1,119

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 13 June 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

Tue 1/9

08:55-21:20

1 stop19h 25m

Idaho Falls Fanning Field

Fri 25/9

12:15-10:55

1 stop15h 40m

£823

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

08:55-21:20

1 stop19h 25m

Idaho Falls Fanning Field

Fri 25/9

12:15-10:55

1 stop15h 40m

£825

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

10:05-21:20

2 stops18h 15m

Idaho Falls Fanning Field

Fri 25/9

12:15-10:55

1 stop15h 40m

£827
Fastest return journey

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

10:05-21:20

1 stop18h 15m

Idaho Falls Fanning Field

Fri 25/9

12:15-09:05

1 stop13h 50m

£828

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

13:05-22:56

2 stops40h 51m

Idaho Falls Fanning Field

Fri 25/9

06:18-11:55

2 stops22h 37m

£832

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

06:15-18:20

2 stops19h 05m

Idaho Falls Fanning Field

Fri 25/9

13:04-13:05

2 stops17h 01m

£840

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

06:15-18:20

2 stops19h 05m

Idaho Falls Fanning Field

Fri 25/9

13:04-13:05

2 stops17h 01m

£845

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

£866

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Tue 1/9

13:00-22:56

2 stops40h 56m

Idaho Falls Fanning Field

Fri 25/9

06:18-14:40

2 stops25h 22m

£866

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Tue 1/9

13:00-22:56

2 stops16h 56m

Idaho Falls Fanning Field

Fri 25/9

14:01-14:40

2 stops17h 39m

£914

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

16h 16m

Direct flights

None
The fastest flight from London to Idaho Falls takes 16h 16m
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 16h 16m.

  • 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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