Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London to Idaho Falls from $576

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 9/9. 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

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from London to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:55 pm - 9:20 pm
LHR
-
IDA
15h 25m
1 stop
Multiple Airlines Logo
7:00 am - 10:55 am
IDA
-
LHR
20h 55m
1 stop
$1,118Multiple Airlines
Tue, Sep 1 - Fri, Sep 25
Multiple Airlines Logo
12:55 pm - 9:20 pm
LHR
-
IDA
15h 25m
1 stop
Multiple Airlines Logo
7:00 am - 10:55 am
IDA
-
LHR
20h 55m
1 stop
$1,120Multiple Airlines
Tue, Sep 1 - Fri, Sep 25
Delta Logo
6:15 am - 6:20 pm
LHR
-
IDA
19h 05m
2 stops
Delta Logo
6:57 pm - 8:10 pm
IDA
-
LHR
18h 13m
2 stops
$1,139Delta
Tue, Sep 1 - Fri, Sep 25
Delta Logo
6:15 am - 6:20 pm
LHR
-
IDA
19h 05m
2 stops
Delta Logo
6:57 pm - 8:10 pm
IDA
-
LHR
18h 13m
2 stops
$1,141Delta
Tue, Sep 1 - Fri, Sep 25
Multiple Airlines Logo
12:55 pm - 9:20 pm
LHR
-
IDA
15h 25m
1 stop
Multiple Airlines Logo
2:08 pm - 10:55 am
IDA
-
LHR
13h 47m
1 stop
$1,142Multiple Airlines
Tue, Sep 1 - Fri, Sep 25
Delta Logo
6:15 am - 6:20 pm
LHR
-
IDA
19h 05m
2 stops
Delta Logo
6:57 pm - 8:10 pm
IDA
-
LHR
18h 13m
2 stops
$1,143Delta
Tue, Sep 1 - Fri, Sep 25
Delta Logo
10:55 am - 10:32 pm
LHR
-
IDA
18h 37m
1 stop
Delta Logo
6:57 pm - 8:10 pm
IDA
-
LHR
18h 13m
2 stops
$1,150Delta
Tue, Sep 1 - Fri, Sep 25
Delta Logo
10:55 am - 10:32 pm
LHR
-
IDA
18h 37m
1 stop
Delta Logo
6:57 pm - 8:10 pm
IDA
-
LHR
18h 13m
2 stops
$1,152Delta
Tue, Sep 1 - Fri, Sep 25
Alaska Airlines Logo
5:00 pm - 3:20 pm
LHR
-
IDA
29h 20m
1 stop
Alaska Airlines Logo
1:46 pm - 3:05 pm
IDA
-
LHR
18h 19m
1 stop
$1,166Alaska Airlines
Wed, Sep 30 - Sun, Oct 4
Icelandair Logo
3:40 pm - 1:24 pm
LGW
-
IDA
52h 44m
2 stops
Icelandair Logo
2:01 pm - 2:40 pm
IDA
-
LGW
17h 39m
2 stops
$1,253Icelandair
Tue, Sep 1 - Fri, Sep 25

Alaska Airlines flights from London to Idaho Falls

Our best Alaska Airlines deals on London to Idaho Falls flight tickets
Alaska Airlines
Sep 30
LHR5:00 pmLondon Heathrow
29h 20m
1 stop
IDA3:20 pmIdaho Falls Fanning Field
Oct 4
IDA1:46 pmIdaho Falls Fanning Field
18h 19m
1 stop
LHR3:05 pmLondon Heathrow
$1,166
Alaska Airlines
Sep 30
LHR5:00 pmLondon Heathrow
29h 20m
1 stop
IDA3:20 pmIdaho Falls Fanning Field
Oct 4
IDA1:46 pmIdaho Falls Fanning Field
18h 19m
1 stop
LHR3:05 pmLondon Heathrow
$1,168
Alaska Airlines
Jul 28
LHR5:00 pmLondon Heathrow
29h 37m
1 stop
IDA3:37 pmIdaho Falls Fanning Field
Aug 28
IDA3:57 pmIdaho Falls Fanning Field
16h 08m
2 stops
LHR3:05 pmLondon Heathrow
$1,454

United Airlines flights from London to Idaho Falls

Our best United Airlines deals on London to Idaho Falls flight tickets
United Airlines
Sep 30
LHR9:30 amLondon Heathrow
36h 53m
2 stops
IDA3:23 pmIdaho Falls Fanning Field
Oct 4
IDA5:53 pmIdaho Falls Fanning Field
30h 52m
2 stops
LHR7:45 amLondon Heathrow
$1,241
United Airlines
Sep 30
LHR9:30 amLondon Heathrow
31h 23m
2 stops
IDA9:53 amIdaho Falls Fanning Field
Oct 4
IDA5:53 pmIdaho Falls Fanning Field
32h 47m
1 stop
LHR9:40 amLondon Heathrow
$1,243
United Airlines
Jul 12
LHR2:50 pmLondon Heathrow
26h 00m
1 stop
IDA9:50 amIdaho Falls Fanning Field
Jul 19
IDA5:54 pmIdaho Falls Fanning Field
30h 51m
2 stops
LHR7:45 amLondon Heathrow
$1,474

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 June 1, 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

Cheapest round-trip

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/1

12:55 pm-9:20 pm

1 stop15h 25m

Idaho Falls Fanning Field

Fri 9/25

7:00 am-10:55 am

1 stop20h 55m

$1,118

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/1

12:55 pm-9:20 pm

1 stop15h 25m

Idaho Falls Fanning Field

Fri 9/25

7:00 am-10:55 am

1 stop20h 55m

$1,120

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/1

6:15 am-6:20 pm

2 stops19h 05m

Idaho Falls Fanning Field

Fri 9/25

6:57 pm-8:10 pm

2 stops18h 13m

$1,139

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/1

6:15 am-6:20 pm

2 stops19h 05m

Idaho Falls Fanning Field

Fri 9/25

6:57 pm-8:10 pm

2 stops18h 13m

$1,141
Quickest round-trip

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/1

12:55 pm-9:20 pm

1 stop15h 25m

Idaho Falls Fanning Field

Fri 9/25

2:08 pm-10:55 am

1 stop13h 47m

$1,142

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/1

6:15 am-6:20 pm

2 stops19h 05m

Idaho Falls Fanning Field

Fri 9/25

6:57 pm-8:10 pm

2 stops18h 13m

$1,143

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/1

10:55 am-10:32 pm

1 stop18h 37m

Idaho Falls Fanning Field

Fri 9/25

6:57 pm-8:10 pm

2 stops18h 13m

$1,150

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/1

10:55 am-10:32 pm

1 stop18h 37m

Idaho Falls Fanning Field

Fri 9/25

6:57 pm-8:10 pm

2 stops18h 13m

$1,152

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 9/30

5:00 pm-3:20 pm

1 stop29h 20m

Idaho Falls Fanning Field

Sun 10/4

1:46 pm-3:05 pm

1 stop18h 19m

$1,166

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Tue 9/1

3:40 pm-1:24 pm

2 stops52h 44m

Idaho Falls Fanning Field

Fri 9/25

2:01 pm-2:40 pm

2 stops17h 39m

$1,253

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

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

You could potentially save up to 3% 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

15h 25m

Direct flights

None
The fastest flight from London to Idaho Falls takes 15h 25m
There are no direct flights from London to Idaho Falls. There are no popular flight routes from London to Idaho Falls.
Search flight deals

Frequently asked questions about flying from London to Idaho Falls

  • 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 15h 25m 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.

An easier way to manage your Idaho Falls trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 7/1
Wed 7/8
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States