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Cheap flights from London to Idaho Falls from £532

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 to Idaho Falls departing on 14/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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.
Finnair Logo
12:55 - 13:13
LHR
-
IDA
31h 18m
1 stop
Finnair Logo
12:36 - 06:15
IDA
-
LHR
34h 39m
2 stops
£832Finnair
Mon, 18 May - Sun, 24 May
Multiple Airlines Logo
09:50 - 22:45
LHR
-
IDA
19h 55m
1 stop
Multiple Airlines Logo
06:00 - 06:50
IDA
-
LHR
17h 50m
1 stop
£851Multiple Airlines
Mon, 18 May - Sun, 24 May
Multiple Airlines Logo
10:50 - 22:52
LHR
-
IDA
19h 02m
2 stops
Multiple Airlines Logo
13:10 - 10:00
IDA
-
LHR
13h 50m
1 stop
£861Multiple Airlines
Wed, 1 Apr - Wed, 8 Apr
Delta Logo
10:45 - 22:42
LHR
-
IDA
18h 57m
2 stops
Delta Logo
11:30 - 14:35
IDA
-
LHR
20h 05m
2 stops
£868Delta
Mon, 18 May - Sun, 24 May
Multiple Airlines Logo
15:40 - 22:45
LGW
-
IDA
38h 05m
2 stops
Multiple Airlines Logo
13:43 - 14:40
IDA
-
LGW
17h 57m
2 stops
£921Multiple Airlines
Mon, 18 May - Sun, 24 May
Multiple Airlines Logo
21:25 - 22:52
LHR
-
IDA
32h 27m
2 stops
Multiple Airlines Logo
13:10 - 15:00
IDA
-
LHR
18h 50m
2 stops
£991Multiple Airlines
Wed, 1 Apr - Wed, 8 Apr
American Airlines Logo
10:05 - 21:57
LHR
-
IDA
18h 52m
1 stop
American Airlines Logo
07:00 - 10:15
IDA
-
LHR
20h 15m
2 stops
£1,022American Airlines
Wed, 15 Jul - Tue, 21 Jul
American Airlines Logo
17:10 - 13:13
LHR
-
IDA
27h 03m
2 stops
American Airlines Logo
12:41 - 08:05
IDA
-
LHR
12h 24m
1 stop
£1,052American Airlines
Sun, 26 Jul - Tue, 4 Aug
Alaska Airlines Logo
17:00 - 23:59
LHR
-
IDA
13h 59m
1 stop
Alaska Airlines Logo
16:03 - 15:05
IDA
-
LHR
16h 02m
1 stop
£1,058Alaska Airlines
Tue, 11 Aug - Wed, 19 Aug
Alaska Airlines Logo
17:00 - 23:59
LHR
-
IDA
13h 59m
1 stop
Alaska Airlines Logo
13:59 - 15:05
IDA
-
LHR
18h 06m
1 stop
£1,068Alaska Airlines
Wed, 5 Aug - Tue, 11 Aug

American Airlines flights from London to Idaho Falls

Our best American Airlines deals on London to Idaho Falls flight tickets
American Airlines
15 Jul
LHR10:05London Heathrow
18h 52m
1 stop
IDA21:57Idaho Falls Fanning Field
21 Jul
IDA07:00Idaho Falls Fanning Field
20h 15m
2 stops
LHR10:15London Heathrow
£1,022
American Airlines
26 Jul
LHR17:10London Heathrow
27h 03m
2 stops
IDA13:13Idaho Falls Fanning Field
4 Aug
IDA12:41Idaho Falls Fanning Field
12h 24m
1 stop
LHR08:05London Heathrow
£1,052
American Airlines
20 Jul
LHR10:05London Heathrow
18h 52m
1 stop
IDA21:57Idaho Falls Fanning Field
28 Jul
IDA12:41Idaho Falls Fanning Field
21h 14m
2 stops
LHR16:55London Heathrow
£1,077

Alaska Airlines flights from London to Idaho Falls

Our best Alaska Airlines deals on London to Idaho Falls flight tickets
Alaska Airlines
11 Aug
LHR17:00London Heathrow
13h 59m
1 stop
IDA23:59Idaho Falls Fanning Field
19 Aug
IDA16:03Idaho Falls Fanning Field
16h 02m
1 stop
LHR15:05London Heathrow
£1,058
Alaska Airlines
5 Aug
LHR17:00London Heathrow
13h 59m
1 stop
IDA23:59Idaho Falls Fanning Field
11 Aug
IDA13:59Idaho Falls Fanning Field
18h 06m
1 stop
LHR15:05London Heathrow
£1,068
Alaska Airlines
6 Aug
LHR17:00London Heathrow
13h 59m
1 stop
IDA23:59Idaho Falls Fanning Field
12 Aug
IDA16:14Idaho Falls Fanning Field
15h 51m
2 stops
LHR15:05London Heathrow
£1,075

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 17 February 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

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Mon 18/5

12:55-13:13

1 stop31h 18m

Idaho Falls Fanning Field

Sun 24/5

12:36-06:15

2 stops34h 39m

£832

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Mon 18/5

09:50-22:45

1 stop19h 55m

Idaho Falls Fanning Field

Sun 24/5

06:00-06:50

1 stop17h 50m

£851

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 1/4

10:50-22:52

2 stops19h 02m

Idaho Falls Fanning Field

Wed 8/4

13:10-10:00

1 stop13h 50m

£861

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Mon 18/5

10:45-22:42

2 stops18h 57m

Idaho Falls Fanning Field

Sun 24/5

11:30-14:35

2 stops20h 05m

£868

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Mon 18/5

15:40-22:45

2 stops38h 05m

Idaho Falls Fanning Field

Sun 24/5

13:43-14:40

2 stops17h 57m

£921

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 1/4

21:25-22:52

2 stops32h 27m

Idaho Falls Fanning Field

Wed 8/4

13:10-15:00

2 stops18h 50m

£991

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 15/7

10:05-21:57

1 stop18h 52m

Idaho Falls Fanning Field

Tue 21/7

07:00-10:15

2 stops20h 15m

£1,022

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 26/7

17:10-13:13

2 stops27h 03m

Idaho Falls Fanning Field

Tue 4/8

12:41-08:05

1 stop12h 24m

£1,052

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 11/8

17:00-23:59

1 stop13h 59m

Idaho Falls Fanning Field

Wed 19/8

16:03-15:05

1 stop16h 02m

£1,058

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 5/8

17:00-23:59

1 stop13h 59m

Idaho Falls Fanning Field

Tue 11/8

13:59-15:05

1 stop18h 06m

£1,068

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

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

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

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 59% 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

18h 48m

Direct flights

None
The fastest flight from London to Idaho Falls takes 18h 48m
There are no direct flights from London to Idaho Falls. There are no popular flight routes from London to Idaho Falls.
Search flight deals

  • 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 18h 48m.

  • 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.

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

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
Virgin AtlanticPriceFrom £630Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom £746Free CancellationRating
7.4
9,309 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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