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Cheap flights from London to Idaho Falls from $651

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 6/19. 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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Cheap round-trip flights

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LON
-
IDA
4714 mimulti-stop
Multiple Airlines Logo
IDA
-
LON
4714 mimulti-stop
Multiple Airlines

United Airlines flights from London to Idaho Falls

Our best United Airlines deals on London to Idaho Falls flight tickets
United Airlines
Feb 25
LHR6:35 amLondon Heathrow
34h 13m
2 stops
IDA9:48 amIdaho Falls Fanning Field
Mar 1
IDA5:33 pmIdaho Falls Fanning Field
33h 07m
1 stop
LHR9:40 amLondon Heathrow
$1,599
United Airlines
Feb 25
LHR6:35 amLondon Heathrow
37h 55m
2 stops
IDA1:30 pmIdaho Falls Fanning Field
Mar 1
IDA5:33 pmIdaho Falls Fanning Field
33h 07m
1 stop
LHR9:40 amLondon Heathrow
$1,600
United Airlines
Feb 25
LHR6:35 amLondon Heathrow
34h 13m
2 stops
IDA9:48 amIdaho Falls Fanning Field
Mar 1
IDA5:33 pmIdaho Falls Fanning Field
34h 47m
2 stops
LHR11:20 amLondon Heathrow
$1,607

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 February 22, 2026.
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

LGW - IDA

LGWIDA

London Gatwick

Fri 6/19

10:10 am-11:59 pm

2 stops20h 49m

$651

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 6/19

6:00 pm-6:14 pm

2 stops31h 14m

$864

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 6/19

5:00 pm-11:59 pm

1 stop13h 59m

$873

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 3/10

11:35 am-9:06 pm

1 stop15h 31m

$1,120

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 6/19

10:20 am-10:39 am

3 stops31h 19m

$3,749

Flights are sorted by cheapest round-trip flights first.

Sorted 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

Can stopping save me money on London to Idaho Falls flights?

You could potentially save up to 6% on your flight if you consider stops on a London to Idaho Falls flight.

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

Fastest flight time

17h 49m

Direct flights

None
The fastest flight from London to Idaho Falls takes 17h 49m
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 17h 49m 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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