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Cheap flights from London to Idaho Falls from £668

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 19/2. 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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Cheap return flights

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American Airlines Logo
08:20 - 23:07LHR-IDA
21h 47m2 stops
American Airlines Logo
14:02 - 10:10IDA-LHR
37h 08m2 stops
£668American Airlines
Find Deal
Thu, 19 Feb - Mon, 23 Feb
American Airlines Logo
14:20 - 23:07LHR-IDA
15h 47m1 stop
American Airlines Logo
14:02 - 12:15IDA-LHR
15h 13m1 stop
£698American Airlines
Find Deal
Thu, 19 Feb - Mon, 23 Feb
United Airlines Logo
06:30 - 21:20LHR-IDA
21h 50m2 stops
United Airlines Logo
17:30 - 20:35IDA-LHR
20h 05m2 stops
£766United Airlines
Find Deal
Thu, 19 Feb - Mon, 23 Feb
United Airlines Logo
11:35 - 21:20LHR-IDA
16h 45m1 stop
United Airlines Logo
14:40 - 09:40IDA-LHR
12h 00m1 stop
£789United Airlines
Find Deal
Thu, 19 Feb - Mon, 23 Feb
United Airlines Logo
10:00 - 21:12LHR-IDA
18h 12m2 stops
United Airlines Logo
16:05 - 07:10IDA-LHR
32h 05m2 stops
£1,615United Airlines
Find Deal
Wed, 17 Dec - Sat, 20 Dec
United Airlines Logo
10:00 - 21:12LHR-IDA
18h 12m2 stops
United Airlines Logo
14:30 - 09:40IDA-LHR
12h 10m1 stop
£2,669United Airlines
Find Deal
Wed, 17 Dec - Sat, 20 Dec
United Airlines Logo
11:35 - 21:12LHR-IDA
16h 37m1 stop
United Airlines Logo
10:45 - 09:40IDA-LHR
15h 55m1 stop
£4,533United Airlines
Find Deal
Wed, 17 Dec - Sat, 20 Dec

American Airlines flights from London to Idaho Falls

Our best American Airlines deals on London to Idaho Falls flight tickets
American Airlines
19 Feb
LHR08:20London Heathrow
21h 47m
2 stops
IDA23:07Idaho Falls Fanning Field
23 Feb
IDA14:02Idaho Falls Fanning Field
37h 08m
2 stops
LHR10:10London Heathrow
£668
Find similar
American Airlines
19 Feb
LHR14:20London Heathrow
15h 47m
1 stop
IDA23:07Idaho Falls Fanning Field
23 Feb
IDA14:02Idaho Falls Fanning Field
15h 13m
1 stop
LHR12:15London Heathrow
£698
Find similar

United Airlines flights from London to Idaho Falls

Our best United Airlines deals on London to Idaho Falls flight tickets
United Airlines
19 Feb
LHR06:30London Heathrow
21h 50m
2 stops
IDA21:20Idaho Falls Fanning Field
23 Feb
IDA17:30Idaho Falls Fanning Field
20h 05m
2 stops
LHR20:35London Heathrow
£766
Find similar
United Airlines
19 Feb
LHR11:35London Heathrow
16h 45m
1 stop
IDA21:20Idaho Falls Fanning Field
23 Feb
IDA14:40Idaho Falls Fanning Field
12h 00m
1 stop
LHR09:40London Heathrow
£789
Find similar
United Airlines
19 Feb
LHR07:30London Heathrow
20h 50m
2 stops
IDA21:20Idaho Falls Fanning Field
23 Feb
IDA10:45Idaho Falls Fanning Field
17h 30m
2 stops
LHR11:15London Heathrow
£850
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 4 December 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

Thu 19/2

08:20-23:07

2 stops21h 47m

Idaho Falls Fanning Field

Mon 23/2

14:02-10:10

2 stops37h 08m

£668

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 19/2

14:20-23:07

1 stop15h 47m

Idaho Falls Fanning Field

Mon 23/2

14:02-12:15

1 stop15h 13m

£698

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 19/2

06:30-21:20

2 stops21h 50m

Idaho Falls Fanning Field

Mon 23/2

17:30-20:35

2 stops20h 05m

£766

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 19/2

11:35-21:20

1 stop16h 45m

Idaho Falls Fanning Field

Mon 23/2

14:40-09:40

1 stop12h 00m

£789

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 17/12

10:00-21:12

2 stops18h 12m

Idaho Falls Fanning Field

Sat 20/12

16:05-07:10

2 stops32h 05m

£1,615

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 17/12

10:00-21:12

2 stops18h 12m

Idaho Falls Fanning Field

Sat 20/12

14:30-09:40

1 stop12h 10m

£2,669

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 17/12

11:35-21:12

1 stop16h 37m

Idaho Falls Fanning Field

Sat 20/12

10:45-09:40

1 stop15h 55m

£4,533

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 6/1

16:00-12:34

2 stops27h 34m

£673

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 6/1

15:05-13:37

2 stops29h 32m

£675

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Mon 5/1

17:20-22:19

2 stops35h 59m

£679

Flights are sorted by cheapest return flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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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 £696. 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 £961.

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 £783. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £898 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

Fastest flight time

21h 50m

Direct flights

None
The fastest flight from London to Idaho Falls takes 21h 50m
There are no direct flights from London to Idaho Falls. There are no popular flight routes from London to Idaho Falls.
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  • 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 15h 47m.

  • 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 £656Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom £766Free CancellationRating
7.4
9,063 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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