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Cheap flights from Idaho Falls to the United Kingdom from £387

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 6/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
United Airlines Logo
17:20 - 12:20
IDA
-
LHR
12h 00m
1 stop
United Airlines Logo
06:55 - 09:53
LHR
-
IDA
33h 58m
2 stops
£475United Airlines
Tue, 7 Apr - Tue, 14 Apr
United Airlines Logo
17:20 - 06:30
IDA
-
LHR
30h 10m
2 stops
United Airlines Logo
07:25 - 09:53
LHR
-
IDA
33h 28m
2 stops
£478United Airlines
Tue, 7 Apr - Tue, 14 Apr
United Airlines Logo
17:20 - 20:40
IDA
-
LHR
20h 20m
2 stops
United Airlines Logo
07:25 - 09:53
LHR
-
IDA
33h 28m
2 stops
£479United Airlines
Tue, 7 Apr - Tue, 14 Apr
United Airlines Logo
10:40 - 12:20
IDA
-
LHR
18h 40m
1 stop
United Airlines Logo
07:30 - 09:55
LHR
-
IDA
33h 25m
2 stops
£483United Airlines
Tue, 5 May - Fri, 15 May
United Airlines Logo
17:26 - 06:30
IDA
-
LHR
30h 04m
2 stops
United Airlines Logo
07:30 - 09:55
LHR
-
IDA
33h 25m
2 stops
£486United Airlines
Tue, 5 May - Fri, 15 May
Delta Logo
05:25 - 10:30
IDA
-
LHR
22h 05m
2 stops
Delta Logo
20:00 - 12:27
LHR
-
IDA
22h 27m
2 stops
£487Delta
Sat, 7 Mar - Tue, 24 Mar
United Airlines Logo
10:40 - 09:40
IDA
-
LHR
16h 00m
1 stop
United Airlines Logo
11:25 - 21:02
LHR
-
IDA
16h 37m
1 stop
£496United Airlines
Tue, 7 Apr - Tue, 14 Apr
Delta Logo
05:25 - 10:00
IDA
-
LHR
21h 35m
1 stop
Delta Logo
10:45 - 22:16
LHR
-
IDA
17h 31m
1 stop
£558Delta
Sat, 7 Mar - Wed, 25 Mar
Delta Logo
05:25 - 16:50
IDA
-
LHR
28h 25m
2 stops
Delta Logo
10:45 - 18:15
LHR
-
IDA
13h 30m
1 stop
£561Delta
Sat, 7 Mar - Thu, 26 Mar
United Airlines Logo
14:31 - 09:40
IDA
-
LHR
12h 09m
1 stop
United Airlines Logo
06:55 - 17:22
LHR
-
IDA
17h 27m
2 stops
£568United Airlines
Wed, 13 May - Wed, 27 May

United Airlines flights from Idaho Falls to United Kingdom

Our best United Airlines deals on Idaho Falls to United Kingdom flight tickets
United Airlines
7 Apr
IDA17:20Idaho Falls Fanning Field
33h 20m
1 stop
LHR09:40London Heathrow
14 Apr
LHR09:00London Heathrow
31h 53m
2 stops
IDA09:53Idaho Falls Fanning Field
£475
United Airlines
7 Apr
IDA17:20Idaho Falls Fanning Field
30h 10m
2 stops
LHR06:30London Heathrow
14 Apr
LHR07:25London Heathrow
33h 28m
2 stops
IDA09:53Idaho Falls Fanning Field
£478
United Airlines
7 Apr
IDA17:20Idaho Falls Fanning Field
20h 20m
2 stops
LHR20:40London Heathrow
14 Apr
LHR09:00London Heathrow
31h 53m
2 stops
IDA09:53Idaho Falls Fanning Field
£479

Delta flights from Idaho Falls to United Kingdom

Our best Delta deals on Idaho Falls to United Kingdom flight tickets
Delta
29 Apr
IDA05:47Idaho Falls Fanning Field
26h 13m
2 stops
LHR15:00London Heathrow
6 May
LHR15:20London Heathrow
33h 54m
2 stops
IDA18:14Idaho Falls Fanning Field
£493
Delta
29 Apr
IDA05:47Idaho Falls Fanning Field
28h 48m
2 stops
LHR17:35London Heathrow
7 May
LHR10:55London Heathrow
14h 19m
1 stop
IDA18:14Idaho Falls Fanning Field
£499
Delta
29 Apr
IDA18:58Idaho Falls Fanning Field
15h 37m
2 stops
LHR17:35London Heathrow
4 May
LHR09:55London Heathrow
19h 45m
2 stops
IDA22:40Idaho Falls Fanning Field
£536

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 10 February 2026.
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

Tue 7/4

17:20-12:20

1 stop12h 00m

London Heathrow

Tue 14/4

06:55-09:53

2 stops33h 58m

£475

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 7/4

17:20-06:30

2 stops30h 10m

London Heathrow

Tue 14/4

07:25-09:53

2 stops33h 28m

£478

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 7/4

17:20-20:40

2 stops20h 20m

London Heathrow

Tue 14/4

07:25-09:53

2 stops33h 28m

£479

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 5/5

10:40-12:20

1 stop18h 40m

London Heathrow

Fri 15/5

07:30-09:55

2 stops33h 25m

£483

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 5/5

17:26-06:30

2 stops30h 04m

London Heathrow

Fri 15/5

07:30-09:55

2 stops33h 25m

£486

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Sat 7/3

05:25-10:30

2 stops22h 05m

London Heathrow

Tue 24/3

20:00-12:27

2 stops22h 27m

£487

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 7/4

10:40-09:40

1 stop16h 00m

London Heathrow

Tue 14/4

11:25-21:02

1 stop16h 37m

£496

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Sat 7/3

05:25-10:00

1 stop21h 35m

London Heathrow

Wed 25/3

10:45-22:16

1 stop17h 31m

£558

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Sat 7/3

05:25-16:50

2 stops28h 25m

London Heathrow

Thu 26/3

10:45-18:15

1 stop13h 30m

£561

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 13/5

14:31-09:40

1 stop12h 09m

London Heathrow

Wed 27/5

06:55-17:22

2 stops17h 27m

£568

Flights are sorted by cheapest return flights first.

Showing 1-10 of 12 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

12h 09m

Direct flights

None
The fastest flight from Idaho Falls to United Kingdom takes 12h 09m
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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