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Cheap flights from London to Idaho Falls from £789

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.
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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.
Icelandair Logo
21:25 - 22:56
LHR
-
IDA
32h 31m
2 stops
Icelandair Logo
06:18 - 11:55
IDA
-
LHR
22h 37m
2 stops
£789Icelandair
Tue, 1 Sep - Fri, 25 Sep
Icelandair Logo
13:00 - 22:56
LGW
-
IDA
16h 56m
2 stops
Icelandair Logo
16:14 - 14:40
IDA
-
LGW
39h 26m
2 stops
£807Icelandair
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
£809Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
13:05 - 22:56
LHR
-
IDA
16h 51m
2 stops
Multiple Airlines Logo
06:18 - 20:20
IDA
-
LHR
31h 02m
2 stops
£810Multiple Airlines
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
£811Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
13:05 - 22:56
LHR
-
IDA
16h 51m
2 stops
Multiple Airlines Logo
06:18 - 20:20
IDA
-
LHR
31h 02m
2 stops
£812Multiple Airlines
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
£813Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
13:05 - 22:56
LHR
-
IDA
16h 51m
2 stops
Multiple Airlines Logo
06:18 - 20:20
IDA
-
LHR
31h 02m
2 stops
£814Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Alaska Airlines Logo
17:00 - 15:37
LHR
-
IDA
29h 37m
1 stop
Alaska Airlines Logo
07:15 - 15:05
IDA
-
LHR
24h 50m
1 stop
£832Alaska Airlines
Tue, 9 Jun - Tue, 16 Jun
Iberia Logo
12:55 - 21:20
LHR
-
IDA
15h 25m
1 stop
Iberia Logo
07:00 - 06:25
IDA
-
LHR
16h 25m
2 stops
£858Iberia
Tue, 1 Sep - Fri, 25 Sep

Alaska Airlines flights from London to Idaho Falls

Our best Alaska Airlines deals on London to Idaho Falls flight tickets
Alaska Airlines
9 Jun
LHR17:00London Heathrow
29h 37m
1 stop
IDA15:37Idaho Falls Fanning Field
16 Jun
IDA07:15Idaho Falls Fanning Field
24h 50m
1 stop
LHR15:05London Heathrow
£832
Alaska Airlines
5 Nov
LHR14:45London Heathrow
14h 54m
1 stop
IDA22:39Idaho Falls Fanning Field
9 Nov
IDA06:15Idaho Falls Fanning Field
23h 05m
1 stop
LHR12:20London Heathrow
£847
Alaska Airlines
5 Nov
LHR14:45London Heathrow
14h 54m
1 stop
IDA22:39Idaho Falls Fanning Field
9 Nov
IDA06:15Idaho Falls Fanning Field
23h 05m
1 stop
LHR12:20London Heathrow
£849

KLM flights from London to Idaho Falls

Our best KLM deals on London to Idaho Falls flight tickets
KLM
1 Sept
LHR09:55London Heathrow
19h 19m
2 stops
IDA22:14Idaho Falls Fanning Field
25 Sept
IDA18:50Idaho Falls Fanning Field
32h 10m
1 stop
LHR10:00London Heathrow
£867
KLM
1 Sept
LHR09:55London Heathrow
19h 19m
2 stops
IDA22:14Idaho Falls Fanning Field
25 Sept
IDA18:50Idaho Falls Fanning Field
32h 10m
1 stop
LHR10:00London Heathrow
£867
KLM
1 Sept
LHR09:55London Heathrow
19h 19m
2 stops
IDA22:14Idaho Falls Fanning Field
25 Sept
IDA18:50Idaho Falls Fanning Field
32h 10m
1 stop
LHR10:00London Heathrow
£870

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 9 May 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

21:25-22:56

2 stops32h 31m

Idaho Falls Fanning Field

Fri 25/9

06:18-11:55

2 stops22h 37m

£789

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Tue 1/9

13:00-22:56

2 stops16h 56m

Idaho Falls Fanning Field

Fri 25/9

16:14-14:40

2 stops39h 26m

£807

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

£809

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

13:05-22:56

2 stops16h 51m

Idaho Falls Fanning Field

Fri 25/9

06:18-20:20

2 stops31h 02m

£810

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

£811

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

13:05-22:56

2 stops16h 51m

Idaho Falls Fanning Field

Fri 25/9

06:18-20:20

2 stops31h 02m

£812

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

£813

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

13:05-22:56

2 stops16h 51m

Idaho Falls Fanning Field

Fri 25/9

06:18-20:20

2 stops31h 02m

£814

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/6

17:00-15:37

1 stop29h 37m

Idaho Falls Fanning Field

Tue 16/6

07:15-15:05

1 stop24h 50m

£832
Fastest return journey

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

12:55-21:20

1 stop15h 25m

Idaho Falls Fanning Field

Fri 25/9

07:00-06:25

2 stops16h 25m

£858

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to Idaho Falls from

How to get the cheapest flight ticket from London 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

Which airlines fly to Idaho Falls?

United Airlines, Lufthansa and Virgin Atlantic are the top three most popular airlines that fly to Idaho Falls from London according to our data. United Airlines is the first choice among our users, with 64% of people opting to fly with this airline when travelling to Idaho Falls. Keep in mind that there are 3 different airlines that fly to Idaho Falls on a routine basis, so you have a few additional options to choose from.

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 20m

Direct flights

None
The fastest flight from London to Idaho Falls takes 16h 20m
There are no direct flights from London to Idaho Falls. There are no popular flight routes from London to Idaho Falls.
Search flight deals

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 20m.

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

  • 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.

Best airlines flying from London to Idaho Falls

Compare and see reviews for airlines that fly from London to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom £868Free CancellationRating
7.4
9,692 reviews
Search United Airlines flights

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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