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Cheap flights from London Heathrow Airport to Idaho Falls from £557

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 19/10. 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.
Icelandair Logo
21:25 - 22:56
LHR
-
IDA
32h 31m
2 stops
Icelandair Logo
06:18 - 11:55
IDA
-
LHR
22h 37m
2 stops
£793Icelandair
Tue, 1 Sep - Fri, 25 Sep
Icelandair Logo
21:25 - 22:56
LHR
-
IDA
32h 31m
2 stops
Icelandair Logo
06:18 - 11:55
IDA
-
LHR
22h 37m
2 stops
£794Icelandair
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
21:25 - 22:56
LHR
-
IDA
32h 31m
2 stops
Multiple Airlines Logo
06:18 - 11:55
IDA
-
LHR
22h 37m
2 stops
£833Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
12:55 - 21:20
LHR
-
IDA
15h 25m
1 stop
Multiple Airlines Logo
12:12 - 10:55
IDA
-
LHR
15h 43m
1 stop
£850Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Alaska Airlines Logo
14:45 - 22:39
LHR
-
IDA
14h 54m
1 stop
Alaska Airlines Logo
06:15 - 12:20
IDA
-
LHR
23h 05m
1 stop
£853Alaska Airlines
Thu, 5 Nov - Mon, 9 Nov
Multiple Airlines Logo
12:55 - 21:20
LHR
-
IDA
15h 25m
1 stop
Multiple Airlines Logo
14:20 - 10:55
IDA
-
LHR
13h 35m
1 stop
£855Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Icelandair Logo
13:05 - 22:56
LHR
-
IDA
40h 51m
2 stops
Icelandair Logo
16:14 - 11:55
IDA
-
LHR
36h 41m
2 stops
£857Icelandair
Tue, 1 Sep - Fri, 25 Sep
Finnair Logo
10:05 - 21:20
LHR
-
IDA
18h 15m
1 stop
Finnair Logo
13:44 - 12:15
IDA
-
LHR
15h 31m
1 stop
£858Finnair
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
12:55 - 21:20
LHR
-
IDA
15h 25m
1 stop
Multiple Airlines Logo
12:12 - 10:55
IDA
-
LHR
15h 43m
1 stop
£861Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Iberia Logo
12:55 - 21:20
LHR
-
IDA
15h 25m
1 stop
Iberia Logo
07:00 - 06:25
IDA
-
LHR
16h 25m
2 stops
£861Iberia
Tue, 1 Sep - Fri, 25 Sep

Alaska Airlines flights from London Heathrow Airport to Idaho Falls

Our best Alaska Airlines deals on London Heathrow Airport to Idaho Falls flight tickets
Alaska Airlines
5 Nov
LHR14:45London Heathrow
14h 54m
1 stop
IDA22:39Idaho Falls Fanning Field
9 Nov
IDA06:15Idaho Falls Fanning Field
23h 05m
1 stop
LHR12:20London Heathrow
£853
Alaska Airlines
9 Jun
LHR17:00London Heathrow
29h 37m
1 stop
IDA15:37Idaho Falls Fanning Field
16 Jun
IDA07:15Idaho Falls Fanning Field
24h 50m
1 stop
LHR15:05London Heathrow
£893
Alaska Airlines
9 Jun
LHR17:00London Heathrow
29h 37m
1 stop
IDA15:37Idaho Falls Fanning Field
16 Jun
IDA07:15Idaho Falls Fanning Field
24h 50m
1 stop
LHR15:05London Heathrow
£895

United Airlines flights from London Heathrow Airport to Idaho Falls

Our best United Airlines deals on London Heathrow Airport to Idaho Falls flight tickets
United Airlines
5 Nov
LHR11:10London Heathrow
18h 43m
2 stops
IDA22:53Idaho Falls Fanning Field
9 Nov
IDA07:00Idaho Falls Fanning Field
17h 55m
2 stops
LHR07:55London Heathrow
£955
United Airlines
6 Jun
LHR11:05London Heathrow
17h 02m
2 stops
IDA21:07Idaho Falls Fanning Field
12 Jun
IDA07:00Idaho Falls Fanning Field
15h 55m
2 stops
LHR05:55London Heathrow
£1,146

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 13 May 2026.
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

Cheapest return flight

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

21:25-22:56

2 stops32h 31m

Idaho Falls Fanning Field

Fri 25/9

06:18-11:55

2 stops22h 37m

£793

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

21:25-22:56

2 stops32h 31m

Idaho Falls Fanning Field

Fri 25/9

06:18-11:55

2 stops22h 37m

£794

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

21:25-22:56

2 stops32h 31m

Idaho Falls Fanning Field

Fri 25/9

06:18-11:55

2 stops22h 37m

£833

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

12:55-21:20

1 stop15h 25m

Idaho Falls Fanning Field

Fri 25/9

12:12-10:55

1 stop15h 43m

£850

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 5/11

14:45-22:39

1 stop14h 54m

Idaho Falls Fanning Field

Mon 9/11

06:15-12:20

1 stop23h 05m

£853
Fastest return journey

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

12:55-21:20

1 stop15h 25m

Idaho Falls Fanning Field

Fri 25/9

14:20-10:55

1 stop13h 35m

£855

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

13:05-22:56

2 stops40h 51m

Idaho Falls Fanning Field

Fri 25/9

16:14-11:55

2 stops36h 41m

£857

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

10:05-21:20

1 stop18h 15m

Idaho Falls Fanning Field

Fri 25/9

13:44-12:15

1 stop15h 31m

£858

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

12:55-21:20

1 stop15h 25m

Idaho Falls Fanning Field

Fri 25/9

12:12-10:55

1 stop15h 43m

£861

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

12:55-21:20

1 stop15h 25m

Idaho Falls Fanning Field

Fri 25/9

07:00-06:25

2 stops16h 25m

£861

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

Which airlines fly to Idaho Falls?

United Airlines, Lufthansa and Virgin Atlantic are the top three most popular airlines that fly to Idaho Falls from London Heathrow Airport according to our data. United Airlines is the first choice among our users, with 58% of people opting to fly with this airline when travelling to Idaho Falls. Keep in mind that there are 3 different airlines that fly to Idaho Falls on a routine basis, so you have a few additional options to choose from.

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

16h 20m

Direct flights

None
The fastest flight from London Heathrow Airport to Idaho Falls takes 16h 20m
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.
Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Idaho Falls

  • 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 16h 20m 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 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.

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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