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Cheap flights from Idaho Falls to the United Kingdom from £252

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho Falls to the United Kingdom departing on 8/3. 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 Idaho Falls to the United Kingdom

Cheap return flights

Enter your travel dates to find the best prices.
KLM Logo
13:15 - 10:00
IDA
-
LHR
13h 45m1 stop
KLM Logo
17:05 - 17:51
LHR
-
IDA
31h 46m2 stops
£460KLM
Mon, 26 Jan - Sun, 8 Feb
United Airlines Logo
06:30 - 09:40
IDA
-
LHR
20h 10m1 stop
United Airlines Logo
06:35 - 09:56
LHR
-
IDA
34h 21m2 stops
£466United Airlines
Thu, 22 Jan - Thu, 29 Jan
Delta Logo
18:35 - 10:00
IDA
-
LHR
32h 25m1 stop
Delta Logo
10:00 - 17:51
LHR
-
IDA
38h 51m2 stops
£467Delta
Thu, 22 Jan - Tue, 27 Jan
United Airlines Logo
14:40 - 09:40
IDA
-
LHR
12h 00m1 stop
United Airlines Logo
11:10 - 15:31
LHR
-
IDA
59h 21m2 stops
£473United Airlines
Wed, 21 Jan - Sun, 25 Jan
United Airlines Logo
16:19 - 09:40
IDA
-
LHR
34h 21m1 stop
United Airlines Logo
11:10 - 15:31
LHR
-
IDA
59h 21m2 stops
£474United Airlines
Wed, 21 Jan - Sun, 25 Jan
United Airlines Logo
14:40 - 07:10
IDA
-
LHR
33h 30m2 stops
United Airlines Logo
11:10 - 13:30
LHR
-
IDA
57h 20m2 stops
£475United Airlines
Wed, 21 Jan - Sun, 25 Jan
United Airlines Logo
14:40 - 07:10
IDA
-
LHR
33h 30m2 stops
United Airlines Logo
11:10 - 15:31
LHR
-
IDA
59h 21m2 stops
£476United Airlines
Wed, 21 Jan - Sun, 25 Jan
United Airlines Logo
14:30 - 09:40
IDA
-
LHR
12h 10m1 stop
United Airlines Logo
07:25 - 09:53
LHR
-
IDA
33h 28m2 stops
£477United Airlines
Tue, 7 Apr - Tue, 14 Apr
United Airlines Logo
17:20 - 10:00
IDA
-
LHR
33h 40m2 stops
United Airlines Logo
07:25 - 09:53
LHR
-
IDA
33h 28m2 stops
£480United Airlines
Tue, 7 Apr - Tue, 14 Apr
Delta Logo
18:35 - 10:00
IDA
-
LHR
32h 25m1 stop
Delta Logo
17:35 - 17:51
LHR
-
IDA
31h 16m2 stops
£480Delta
Thu, 22 Jan - Sun, 25 Jan

American Airlines flights from Idaho Falls to United Kingdom

Our best American Airlines deals on Idaho Falls to United Kingdom flight tickets
American Airlines
13 May
IDA08:24Idaho Falls Fanning Field
23h 41m
1 stop
LHR15:05London Heathrow
27 May
LHR12:55London Heathrow
15h 10m
1 stop
IDA21:05Idaho Falls Fanning Field
£592
Find similar
American Airlines
13 May
IDA08:24Idaho Falls Fanning Field
23h 41m
1 stop
LHR15:05London Heathrow
27 May
LHR12:55London Heathrow
15h 10m
1 stop
IDA21:05Idaho Falls Fanning Field
£593
Find similar
American Airlines
13 May
IDA08:24Idaho Falls Fanning Field
23h 41m
1 stop
LHR15:05London Heathrow
25 May
LHR12:55London Heathrow
15h 10m
1 stop
IDA21:05Idaho Falls Fanning Field
£636
Find similar

United Airlines flights from Idaho Falls to United Kingdom

Our best United Airlines deals on Idaho Falls to United Kingdom flight tickets
United Airlines
22 Jan
IDA16:19Idaho Falls Fanning Field
34h 21m
1 stop
LHR09:40London Heathrow
27 Jan
LHR06:35London Heathrow
34h 21m
2 stops
IDA09:56Idaho Falls Fanning Field
£466
Find similar
United Airlines
21 Jan
IDA16:19Idaho Falls Fanning Field
34h 21m
1 stop
LHR09:40London Heathrow
25 Jan
LHR11:10London Heathrow
57h 20m
2 stops
IDA13:30Idaho Falls Fanning Field
£473
Find similar
United Airlines
21 Jan
IDA16:19Idaho Falls Fanning Field
34h 21m
1 stop
LHR09:40London Heathrow
25 Jan
LHR11:10London Heathrow
59h 21m
2 stops
IDA15:31Idaho Falls Fanning Field
£474
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Idaho Falls to United Kingdom 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 26 December 2025.
Use the filters below to find and compare flights from Idaho Falls to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 26/1

13:15-10:00

1 stop13h 45m

London Heathrow

Sun 8/2

17:05-17:51

2 stops31h 46m

£460

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 22/1

06:30-09:40

1 stop20h 10m

London Heathrow

Thu 29/1

06:35-09:56

2 stops34h 21m

£466

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 22/1

18:35-10:00

1 stop32h 25m

London Heathrow

Tue 27/1

10:00-17:51

2 stops38h 51m

£467

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 21/1

14:40-09:40

1 stop12h 00m

London Heathrow

Sun 25/1

11:10-15:31

2 stops59h 21m

£473

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 21/1

16:19-09:40

1 stop34h 21m

London Heathrow

Sun 25/1

11:10-15:31

2 stops59h 21m

£474

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 21/1

14:40-07:10

2 stops33h 30m

London Heathrow

Sun 25/1

11:10-13:30

2 stops57h 20m

£475

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 21/1

14:40-07:10

2 stops33h 30m

London Heathrow

Sun 25/1

11:10-15:31

2 stops59h 21m

£476

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 7/4

14:30-09:40

1 stop12h 10m

London Heathrow

Tue 14/4

07:25-09:53

2 stops33h 28m

£477

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 7/4

17:20-10:00

2 stops33h 40m

London Heathrow

Tue 14/4

07:25-09:53

2 stops33h 28m

£480

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 22/1

18:35-10:00

1 stop32h 25m

London Heathrow

Sun 25/1

17:35-17:51

2 stops31h 16m

£480

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 the United Kingdom from

How to get the cheapest flight ticket from Idaho Falls to United Kingdom

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 Idaho Falls Fanning Field to United Kingdom?

United Airlines is the most popular carrier operating from Idaho Falls Fanning Field to United Kingdom

Cheap Idaho Falls to United Kingdom flight deals and tips

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

Fastest flight time

11h 23m

Direct flights

None
The fastest flight from Idaho Falls to United Kingdom takes 11h 23m
There are no direct flights from Idaho Falls to United Kingdom. There are no popular flight routes from Idaho Falls to United Kingdom.
Search flight deals

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

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

  • How old do you have to be to fly from Idaho Falls Fanning Field Airport to United Kingdom?

    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 Idaho Falls Fanning Field Airport to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The travel and health documents required for your trip to United Kingdom 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 United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

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 United Kingdom from Idaho Falls.

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

Flights from Idaho Falls to United Kingdom 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 Idaho Falls to United Kingdom?

momondo provides multiple filters to help you find the best flight to United Kingdom from Idaho Falls. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Idaho Falls to United Kingdom right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Idaho Falls to United Kingdom flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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