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Cheap flights from London to Idaho Falls from £384

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 2/12. 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

American Airlines Logo
14:25 - 22:34LHR-IDA
15h 09m1 stop
American Airlines Logo
07:10 - 20:00IDA-LHR
29h 50m2 stops
£596American Airlines
Find Deal
Sat, 22 Nov - Wed, 26 Nov
Delta Logo
06:20 - 22:33LHR-IDA
23h 13m2 stops
Delta Logo
06:00 - 10:00IDA-LHR
21h 00m1 stop
£600Delta
Find Deal
Sat, 22 Nov - Wed, 26 Nov
Delta Logo
10:45 - 18:17LHR-IDA
14h 32m1 stop
Delta Logo
06:00 - 10:00IDA-LHR
21h 00m1 stop
£609Delta
Find Deal
Sat, 22 Nov - Wed, 26 Nov
Delta Logo
10:45 - 18:17LHR-IDA
14h 32m1 stop
Delta Logo
06:00 - 10:00IDA-LHR
21h 00m1 stop
£611Delta
Find Deal
Sat, 22 Nov - Wed, 26 Nov
Multiple Airlines Logo
11:55 - 21:48LHR-IDA
15h 53m1 stop
Multiple Airlines Logo
07:10 - 13:15IDA-LHR
23h 05m1 stop
£624Multiple Airlines
Find Deal
Sat, 1 Nov - Sat, 8 Nov
Delta Logo
10:10 - 22:15LHR-IDA
18h 05m2 stops
Delta Logo
06:00 - 09:05IDA-LHR
20h 05m2 stops
£641Delta
Find Deal
Sat, 1 Nov - Sat, 8 Nov
Delta Logo
06:20 - 22:33LHR-IDA
23h 13m2 stops
Delta Logo
13:19 - 13:50IDA-LHR
17h 31m2 stops
£648Delta
Find Deal
Sat, 22 Nov - Wed, 26 Nov
Air France Logo
06:20 - 18:17LHR-IDA
18h 57m2 stops
Air France Logo
06:00 - 18:20IDA-LHR
29h 20m2 stops
£653Air France
Find Deal
Sat, 22 Nov - Wed, 26 Nov
United Airlines Logo
07:30 - 17:46LHR-IDA
16h 16m2 stops
United Airlines Logo
08:30 - 09:10IDA-LHR
17h 40m2 stops
£666United Airlines
Find Deal
Sat, 1 Nov - Sat, 8 Nov
United Airlines Logo
11:35 - 21:03LHR-IDA
15h 28m1 stop
United Airlines Logo
14:45 - 09:40IDA-LHR
11h 55m1 stop
£688United Airlines
Find Deal
Sat, 1 Nov - Sat, 8 Nov

Delta flights from London to Idaho Falls

Our best Delta deals on London to Idaho Falls flight tickets
Delta
22 Nov
LHR06:20London Heathrow
23h 13m
2 stops
IDA22:33Idaho Falls Fanning Field
26 Nov
IDA06:00Idaho Falls Fanning Field
21h 00m
1 stop
LHR10:00London Heathrow
£600
Find similar
Delta
22 Nov
LHR10:45London Heathrow
14h 32m
1 stop
IDA18:17Idaho Falls Fanning Field
26 Nov
IDA06:00Idaho Falls Fanning Field
21h 00m
1 stop
LHR10:00London Heathrow
£609
Find similar
Delta
22 Nov
LHR10:45London Heathrow
14h 32m
1 stop
IDA18:17Idaho Falls Fanning Field
26 Nov
IDA06:00Idaho Falls Fanning Field
21h 00m
1 stop
LHR10:00London Heathrow
£611
Find similar

United Airlines flights from London to Idaho Falls

Our best United Airlines deals on London to Idaho Falls flight tickets
United Airlines
1 Nov
LHR07:30London Heathrow
16h 16m
2 stops
IDA17:46Idaho Falls Fanning Field
8 Nov
IDA08:30Idaho Falls Fanning Field
17h 40m
2 stops
LHR09:10London Heathrow
£666
Find similar
United Airlines
1 Nov
LHR11:35London Heathrow
15h 28m
1 stop
IDA21:03Idaho Falls Fanning Field
8 Nov
IDA14:45Idaho Falls Fanning Field
11h 55m
1 stop
LHR09:40London Heathrow
£688
Find similar
United Airlines
1 Nov
LHR08:00London Heathrow
19h 03m
2 stops
IDA21:03Idaho Falls Fanning Field
8 Nov
IDA07:00Idaho Falls Fanning Field
17h 30m
2 stops
LHR07:30London Heathrow
£1,728
Find similar

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 18 September 2025.
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

Sat 22/11

14:25-22:34

1 stop15h 09m

Idaho Falls Fanning Field

Wed 26/11

07:10-20:00

2 stops29h 50m

£596

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 22/11

06:20-22:33

2 stops23h 13m

Idaho Falls Fanning Field

Wed 26/11

06:00-10:00

1 stop21h 00m

£600

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 22/11

10:45-18:17

1 stop14h 32m

Idaho Falls Fanning Field

Wed 26/11

06:00-10:00

1 stop21h 00m

£609

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 22/11

10:45-18:17

1 stop14h 32m

Idaho Falls Fanning Field

Wed 26/11

06:00-10:00

1 stop21h 00m

£611

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 1/11

11:55-21:48

1 stop15h 53m

Idaho Falls Fanning Field

Sat 8/11

07:10-13:15

1 stop23h 05m

£624

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 1/11

10:10-22:15

2 stops18h 05m

Idaho Falls Fanning Field

Sat 8/11

06:00-09:05

2 stops20h 05m

£641

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 22/11

06:20-22:33

2 stops23h 13m

Idaho Falls Fanning Field

Wed 26/11

13:19-13:50

2 stops17h 31m

£648

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 22/11

06:20-18:17

2 stops18h 57m

Idaho Falls Fanning Field

Wed 26/11

06:00-18:20

2 stops29h 20m

£653

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 1/11

07:30-17:46

2 stops16h 16m

Idaho Falls Fanning Field

Sat 8/11

08:30-09:10

2 stops17h 40m

£666

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 1/11

11:35-21:03

1 stop15h 28m

Idaho Falls Fanning Field

Sat 8/11

14:45-09:40

1 stop11h 55m

£688

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 day to depart on your flight to Idaho Falls?

According to our data, Tuesday is the cheapest day to fly to Idaho Falls from London. The lowest ticket price found for a Tuesday departure recently was £678. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Saturday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £936.

What is the cheapest time of day to depart on your flight to Idaho Falls?

The cheapest time of day to fly to Idaho Falls is in the afternoon when flights can be purchased for as low as £762. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £875 on average. Flights to Idaho Falls from London in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

Direct flights

None
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 14h 32m.

  • 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 £638Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom £746Free CancellationRating
7.4
8,926 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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