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Cheap flights from London Heathrow Airport to Idaho Falls from £414

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 Heathrow Airport to Idaho Falls departing on 3/3. 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 London Heathrow Airport to Idaho Falls

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
16:30 - 13:37
LHR
-
IDA
28h 07m1 stop
Multiple Airlines Logo
07:20 - 13:15
IDA
-
LHR
22h 55m1 stop
£701Multiple Airlines
Sun, 1 Feb - Sun, 8 Feb
American Airlines Logo
16:30 - 13:37
LHR
-
IDA
28h 07m1 stop
American Airlines Logo
07:20 - 07:50
IDA
-
LHR
17h 30m2 stops
£722American Airlines
Sun, 1 Feb - Sun, 8 Feb
Multiple Airlines Logo
20:35 - 18:18
LHR
-
IDA
52h 43m2 stops
Multiple Airlines Logo
18:58 - 10:50
IDA
-
LHR
32h 52m2 stops
£769Multiple Airlines
Sun, 1 Feb - Sun, 8 Feb

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 1/2

16:30-13:37

1 stop28h 07m

Idaho Falls Fanning Field

Sun 8/2

07:20-13:15

1 stop22h 55m

£701

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 1/2

16:30-13:37

1 stop28h 07m

Idaho Falls Fanning Field

Sun 8/2

07:20-07:50

2 stops17h 30m

£722

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 1/2

20:35-18:18

2 stops52h 43m

Idaho Falls Fanning Field

Sun 8/2

18:58-10:50

2 stops32h 52m

£769

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 3/3

14:50-16:43

2 stops32h 53m

£414

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 4/2

14:50-22:59

3 stops39h 09m

£418

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 3/3

14:50-23:36

3 stops39h 46m

£453

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 4/2

07:40-22:59

2 stops22h 19m

£464

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 3/3

14:20-23:07

1 stop15h 47m

£479

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 21/4

10:05-21:56

1 stop18h 51m

£490

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 21/4

06:15-18:14

2 stops18h 59m

£502

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Idaho Falls from

How to get the cheapest flight ticket from London Heathrow Airport 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 Heathrow Airport. The lowest ticket price found for a Tuesday departure recently was £692. 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 Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £955.

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 £778. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £893 on average. Flights to Idaho Falls from London Heathrow Airport in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

When to book flights from London Heathrow Airport to Idaho Falls

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Idaho Falls according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Idaho Falls (LHR to IDA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Idaho Falls

Fastest flight time

28h 07m

Direct flights

None
The fastest flight from London Heathrow Airport to Idaho Falls takes 28h 07m
There are no direct flights from London Heathrow Airport to Idaho Falls. There are no popular flight routes from London Heathrow Airport to Idaho Falls.
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  • How far is London Heathrow to Idaho Falls Fanning Field by plane?

    There are 4706.6 mi between London Heathrow and Idaho Falls Fanning Field. Typically, this will take 28h 07m by plane in normal conditions.

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

    Prices for flights from London Heathrow Airport to Idaho Falls Fanning Field Airport were last updated today.

  • How many operators does momondo search for flights from London Heathrow Airport to Idaho Falls Fanning Field Airport?

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

    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 London Heathrow Airport 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 you'll need for your trip to Idaho Falls Fanning Field Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho Falls Fanning Field Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from London Heathrow Airport to Idaho Falls

Compare and see reviews for airlines that fly from London Heathrow Airport to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
Virgin AtlanticPriceFrom £652Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom £761Free CancellationRating
7.4
9,091 reviews
Search United Airlines flights

Why use momondo?

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

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 Idaho Falls from London.

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

All flight searches from London to Idaho Falls on momondo can be filtered to show those which offer flexible booking policies.

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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