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Cheap flights from London Heathrow Airport to Idaho Falls from $647

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 11/9. 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
1 adult, Economy, 0 bags

Find the cheapest flights from London Heathrow Airport to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
5:00 pm - 3:20 pmLHR  London Heathrow-IDA Idaho Falls Fanning Field
29h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
1:58 pm - 3:05 pmIDA  Idaho Falls Fanning Field-LHR London Heathrow
18h 07m1 stop Seattle/Tacoma Intl
$1,041Alaska Airlines
Wed, Sep 30 - Wed, Oct 7
Alaska Airlines Logo
2:45 pm - 10:54 pmLHR  London Heathrow-IDA Idaho Falls Fanning Field
15h 09m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
1:53 pm - 12:20 pmIDA  Idaho Falls Fanning Field-LHR London Heathrow
15h 27m1 stop Seattle/Tacoma Intl
$1,083Alaska Airlines
Thu, Nov 5 - Mon, Nov 9
Alaska Airlines Logo
2:45 pm - 10:54 pmLHR  London Heathrow-IDA Idaho Falls Fanning Field
15h 09m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
1:53 pm - 12:20 pmIDA  Idaho Falls Fanning Field-LHR London Heathrow
15h 27m1 stop Seattle/Tacoma Intl
$1,086Alaska Airlines
Thu, Nov 5 - Mon, Nov 9
Alaska Airlines Logo
2:45 pm - 10:54 pmLHR  London Heathrow-IDA Idaho Falls Fanning Field
15h 09m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
1:53 pm - 12:20 pmIDA  Idaho Falls Fanning Field-LHR London Heathrow
15h 27m1 stop Seattle/Tacoma Intl
$1,087Alaska Airlines
Thu, Nov 5 - Mon, Nov 9
Alaska Airlines Logo
2:45 pm - 3:21 pmLHR  London Heathrow-IDA Idaho Falls Fanning Field
31h 36m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
1:56 pm - 12:20 pmIDA  Idaho Falls Fanning Field-LHR London Heathrow
15h 24m1 stop Seattle/Tacoma Intl
$1,088Alaska Airlines
Thu, Jan 28 - Mon, Feb 1
Virgin Atlantic Logo
10:55 am - 10:22 pmLHR  London Heathrow-IDA Idaho Falls Fanning Field
18h 27m1 stop Salt Lake City
Virgin Atlantic Logo
1:05 pm - 3:35 pmIDA  Idaho Falls Fanning Field-LHR London Heathrow
19h 30m2 stops Salt Lake City Seattle/Tacoma Intl
$1,089Virgin Atlantic
Wed, Sep 30 - Wed, Oct 7
Virgin Atlantic Logo
12:25 pm - 10:22 pmLHR  London Heathrow-IDA Idaho Falls Fanning Field
16h 57m2 stops Minneapolis St Paul Salt Lake City
Virgin Atlantic Logo
1:05 pm - 10:15 amIDA  Idaho Falls Fanning Field-LHR London Heathrow
38h 10m2 stops Salt Lake City Los Angeles
$1,099Virgin Atlantic
Wed, Sep 30 - Wed, Oct 7
Virgin Atlantic Logo
10:55 am - 10:22 pmLHR  London Heathrow-IDA Idaho Falls Fanning Field
18h 27m1 stop Salt Lake City
Virgin Atlantic Logo
1:05 pm - 6:45 amIDA  Idaho Falls Fanning Field-LHR London Heathrow
34h 40m2 stops Salt Lake City New York John F Kennedy Intl
$1,130Virgin Atlantic
Tue, Sep 15 - Sat, Sep 19
American Airlines Logo
11:00 am - 9:20 pmLHR  London Heathrow-IDA Idaho Falls Fanning Field
17h 20m1 stop Dallas/Fort Worth
American Airlines Logo
12:15 pm - 9:05 amIDA  Idaho Falls Fanning Field-LHR London Heathrow
13h 50m1 stop Dallas/Fort Worth
$1,173American Airlines
Thu, Sep 17 - Thu, Sep 24
Alaska Airlines Logo
5:00 pm - 3:20 pmLHR  London Heathrow-IDA Idaho Falls Fanning Field
29h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
1:58 pm - 3:05 pmIDA  Idaho Falls Fanning Field-LHR London Heathrow
18h 07m1 stop Seattle/Tacoma Intl
$1,178Alaska Airlines
Thu, Oct 1 - Thu, Oct 8

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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
Sep 30
LHR5:00 pmLondon Heathrow
29h 20m
1 stop
IDA3:20 pmIdaho Falls Fanning Field
Oct 7
IDA1:58 pmIdaho Falls Fanning Field
18h 07m
1 stop
LHR3:05 pmLondon Heathrow
$1,041
Alaska Airlines
Nov 5
LHR2:45 pmLondon Heathrow
15h 09m
1 stop
IDA10:54 pmIdaho Falls Fanning Field
Nov 9
IDA1:53 pmIdaho Falls Fanning Field
15h 27m
1 stop
LHR12:20 pmLondon Heathrow
$1,083
Alaska Airlines
Nov 5
LHR2:45 pmLondon Heathrow
15h 09m
1 stop
IDA10:54 pmIdaho Falls Fanning Field
Nov 9
IDA1:53 pmIdaho Falls Fanning Field
15h 27m
1 stop
LHR12:20 pmLondon Heathrow
$1,086

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
Nov 5
LHR7:30 amLondon Heathrow
20h 39m
2 stops
IDA9:09 pmIdaho Falls Fanning Field
Nov 9
IDA7:00 amIdaho Falls Fanning Field
17h 55m
2 stops
LHR7:55 amLondon Heathrow
$1,298
United Airlines
Nov 5
LHR7:30 amLondon Heathrow
20h 39m
2 stops
IDA9:09 pmIdaho Falls Fanning Field
Nov 9
IDA2:35 pmIdaho Falls Fanning Field
12h 05m
1 stop
LHR9:40 amLondon Heathrow
$1,301
United Airlines
Nov 5
LHR7:30 amLondon Heathrow
20h 39m
2 stops
IDA9:09 pmIdaho Falls Fanning Field
Nov 9
IDA2:35 pmIdaho Falls Fanning Field
12h 05m
1 stop
LHR9:40 amLondon Heathrow
$1,302

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated August 18, 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 round-trip

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Wed 9/30

5:00 pm-3:20 pm

1 stop29h 20m

Idaho Falls Fanning Field

Wed 10/7

1:58 pm-3:05 pm

1 stop18h 07m

$1,041
Quickest round-trip

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 11/5

2:45 pm-10:54 pm

1 stop15h 09m

Idaho Falls Fanning Field

Mon 11/9

1:53 pm-12:20 pm

1 stop15h 27m

$1,083

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 11/5

2:45 pm-10:54 pm

1 stop15h 09m

Idaho Falls Fanning Field

Mon 11/9

1:53 pm-12:20 pm

1 stop15h 27m

$1,086

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 11/5

2:45 pm-10:54 pm

1 stop15h 09m

Idaho Falls Fanning Field

Mon 11/9

1:53 pm-12:20 pm

1 stop15h 27m

$1,087

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 1/28

2:45 pm-3:21 pm

1 stop31h 36m

Idaho Falls Fanning Field

Mon 2/1

1:56 pm-12:20 pm

1 stop15h 24m

$1,088

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Wed 9/30

10:55 am-10:22 pm

1 stop18h 27m

Idaho Falls Fanning Field

Wed 10/7

1:05 pm-3:35 pm

2 stops19h 30m

$1,089

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Wed 9/30

12:25 pm-10:22 pm

2 stops16h 57m

Idaho Falls Fanning Field

Wed 10/7

1:05 pm-10:15 am

2 stops38h 10m

$1,099

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Tue 9/15

10:55 am-10:22 pm

1 stop18h 27m

Idaho Falls Fanning Field

Sat 9/19

1:05 pm-6:45 am

2 stops34h 40m

$1,130

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 9/17

11:00 am-9:20 pm

1 stop17h 20m

Idaho Falls Fanning Field

Thu 9/24

12:15 pm-9:05 am

1 stop13h 50m

$1,173

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 10/1

5:00 pm-3:20 pm

1 stop29h 20m

Idaho Falls Fanning Field

Thu 10/8

1:58 pm-3:05 pm

1 stop18h 07m

$1,178

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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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

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

You could potentially save up to 3% on your flight if you consider stops on a London Heathrow Airport to Idaho Falls flight.

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 round-trip 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

Best Price Found

$647

Fastest flight time

14h 25m

Direct flights

None
The best one-way flight to Idaho Falls from London Heathrow Airport in the past 72 hours is $647. The best round-trip flight deal from London Heathrow Airport to Idaho Falls found on momondo in the last 72 hours is $1,041.
The fastest flight from London Heathrow Airport to Idaho Falls takes 14h 25m
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?

    Idaho Falls Fanning Field is 4706.6 mi away from London Heathrow. In terms of flight time, this usually takes a little over 14h 25m.

  • 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 are updated daily.

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

  • What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

    The required travel and health documents for your Idaho Falls Fanning Field Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Idaho Falls Fanning Field Airport. We recommend that you seek guidance from your airline or a reliable 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?

momondo does allow users to show only those flights to Idaho Falls from London which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Idaho Falls.

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

Of course. momondo tracks the price of London to Idaho Falls flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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