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Cheap flights from London to Idaho Falls from $524

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 12/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from London to Idaho Falls

Cheap round-trip flights

Multiple Airlines Logo
10:05 am - 9:49 pmLHR-IDA
17h 44m1 stop
Multiple Airlines Logo
1:58 pm - 11:40 amIDA-LHR
14h 42m1 stop
$807Multiple Airlines
Find Deal
Thu, Oct 30 - Thu, Nov 6
American Airlines Logo
2:25 pm - 10:34 pmLHR-IDA
15h 09m1 stop
American Airlines Logo
7:10 am - 8:00 pmIDA-LHR
29h 50m2 stops
$814American Airlines
Find Deal
Sat, Nov 22 - Wed, Nov 26
Delta Logo
6:20 am - 6:17 pmLHR-IDA
18h 57m2 stops
Delta Logo
6:00 am - 10:00 amIDA-LHR
21h 00m1 stop
$817Delta
Find Deal
Sat, Nov 22 - Wed, Nov 26
Delta Logo
6:20 am - 10:33 pmLHR-IDA
23h 13m2 stops
Delta Logo
6:00 am - 10:00 amIDA-LHR
21h 00m1 stop
$819Delta
Find Deal
Sat, Nov 22 - Wed, Nov 26
Delta Logo
10:45 am - 6:13 pmLHR-IDA
13h 28m1 stop
Delta Logo
6:00 am - 7:05 amIDA-LHR
18h 05m2 stops
$830Delta
Find Deal
Thu, Oct 30 - Thu, Nov 6
Delta Logo
10:45 am - 6:17 pmLHR-IDA
14h 32m1 stop
Delta Logo
6:00 am - 10:00 amIDA-LHR
21h 00m1 stop
$831Delta
Find Deal
Sat, Nov 22 - Wed, Nov 26
Delta Logo
10:45 am - 6:17 pmLHR-IDA
14h 32m1 stop
Delta Logo
6:00 am - 10:00 amIDA-LHR
21h 00m1 stop
$834Delta
Find Deal
Sat, Nov 22 - Wed, Nov 26
Multiple Airlines Logo
11:55 am - 9:48 pmLHR-IDA
15h 53m1 stop
Multiple Airlines Logo
7:10 am - 1:15 pmIDA-LHR
23h 05m1 stop
$852Multiple Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
British Airways Logo
11:15 am - 12:41 pmLHR-IDA
31h 26m2 stops
British Airways Logo
7:10 am - 10:25 amIDA-LHR
20h 15m2 stops
$872British Airways
Find Deal
Thu, Oct 30 - Thu, Nov 6
Air France Logo
6:20 am - 6:17 pmLHR-IDA
18h 57m2 stops
Air France Logo
6:00 am - 6:20 pmIDA-LHR
29h 20m2 stops
$891Air France
Find Deal
Sat, Nov 22 - Wed, Nov 26

Delta flights from London to Idaho Falls

Our best Delta deals on London to Idaho Falls flight tickets
Delta
Nov 22
LHR6:20 amLondon Heathrow
18h 57m
2 stops
IDA6:17 pmIdaho Falls Fanning Field
Nov 26
IDA6:00 amIdaho Falls Fanning Field
21h 00m
1 stop
LHR10:00 amLondon Heathrow
$817
Find similar
Delta
Nov 22
LHR6:20 amLondon Heathrow
23h 13m
2 stops
IDA10:33 pmIdaho Falls Fanning Field
Nov 26
IDA6:00 amIdaho Falls Fanning Field
21h 00m
1 stop
LHR10:00 amLondon Heathrow
$819
Find similar
Delta
Oct 30
LHR10:45 amLondon Heathrow
13h 28m
1 stop
IDA6:13 pmIdaho Falls Fanning Field
Nov 6
IDA6:00 amIdaho Falls Fanning Field
18h 05m
2 stops
LHR7:05 amLondon Heathrow
$830
Find similar

United Airlines flights from London to Idaho Falls

Our best United Airlines deals on London to Idaho Falls flight tickets
United Airlines
Nov 22
LHR11:10 amLondon Heathrow
18h 42m
2 stops
IDA10:52 pmIdaho Falls Fanning Field
Nov 26
IDA5:00 amIdaho Falls Fanning Field
17h 55m
2 stops
LHR5:55 amLondon Heathrow
$901
Find similar
United Airlines
Nov 1
LHR7:30 amLondon Heathrow
16h 16m
2 stops
IDA5:46 pmIdaho Falls Fanning Field
Nov 8
IDA10:50 amIdaho Falls Fanning Field
15h 50m
1 stop
LHR9:40 amLondon Heathrow
$909
Find similar
United Airlines
Nov 1
LHR11:35 amLondon Heathrow
15h 28m
1 stop
IDA9:03 pmIdaho Falls Fanning Field
Nov 8
IDA2:45 pmIdaho Falls Fanning Field
11h 55m
1 stop
LHR9:40 amLondon Heathrow
$939
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated September 17, 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 10/30

10:05 am-9:49 pm

1 stop17h 44m

Idaho Falls Fanning Field

Thu 11/6

1:58 pm-11:40 am

1 stop14h 42m

$807

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/22

2:25 pm-10:34 pm

1 stop15h 09m

Idaho Falls Fanning Field

Wed 11/26

7:10 am-8:00 pm

2 stops29h 50m

$814

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/22

6:20 am-6:17 pm

2 stops18h 57m

Idaho Falls Fanning Field

Wed 11/26

6:00 am-10:00 am

1 stop21h 00m

$817

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/22

6:20 am-10:33 pm

2 stops23h 13m

Idaho Falls Fanning Field

Wed 11/26

6:00 am-10:00 am

1 stop21h 00m

$819

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 10/30

10:45 am-6:13 pm

1 stop13h 28m

Idaho Falls Fanning Field

Thu 11/6

6:00 am-7:05 am

2 stops18h 05m

$830

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/22

10:45 am-6:17 pm

1 stop14h 32m

Idaho Falls Fanning Field

Wed 11/26

6:00 am-10:00 am

1 stop21h 00m

$831

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/22

10:45 am-6:17 pm

1 stop14h 32m

Idaho Falls Fanning Field

Wed 11/26

6:00 am-10:00 am

1 stop21h 00m

$834

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/1

11:55 am-9:48 pm

1 stop15h 53m

Idaho Falls Fanning Field

Sat 11/8

7:10 am-1:15 pm

1 stop23h 05m

$852

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 10/30

11:15 am-12:41 pm

2 stops31h 26m

Idaho Falls Fanning Field

Thu 11/6

7:10 am-10:25 am

2 stops20h 15m

$872

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/22

6:20 am-6:17 pm

2 stops18h 57m

Idaho Falls Fanning Field

Wed 11/26

6:00 am-6:20 pm

2 stops29h 20m

$891

Flights are sorted by cheapest round-trip 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 airline that flies from London to Idaho Falls Fanning Field?

American Airlines, Delta, and United Airlines are the most popular carriers operating from London to Idaho Falls Fanning Field

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 round-trip 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.
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  • How far is London to Idaho Falls Fanning Field by plane?

    There are 4715.6 mi between London and Idaho Falls Fanning Field. Typically, this will take 13h 28m by plane in normal conditions.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 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.

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Idaho Falls for you.

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

Yes. momondo allows you to filter the results for London to Idaho Falls flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Idaho Falls?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Idaho Falls from London.

I’m not ready to book a flight from London to Idaho Falls right now. Can momondo alert me if prices change?

Price alerts on flights to Idaho Falls from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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