What is the cheapest airline that flies from London to Idaho?

United Airlines, Delta, and KLM are the most popular carriers operating from London to Idaho

When did momondo last update prices for flights from London to Idaho?

Prices for flights from London to Idaho refresh daily.

How old do you have to be to fly from London to Idaho?

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 to Idaho.

What documentation or ID do you need to fly to Idaho?

The required travel and health documents for your Idaho 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. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$504 Cheap Flights from London to Idaho in 2026

Find the cheapest flights from London to Idaho

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:45 pm - 11:55 pmLHR London Heathrow-GEG Spokane

14h 10m1 stop Seattle/Tacoma Intl

1:38 pm - 10:40 amGEG Spokane-LHR London Heathrow

14h 02m1 stop Seattle/Tacoma Intl

$738Multiple Airlines

Thu, Oct 15 - Wed, Oct 28

11:45 am - 11:55 pmLHR London Heathrow-GEG Spokane

20h 10m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

1:38 pm - 10:40 amGEG Spokane-LHR London Heathrow

14h 02m1 stop Seattle/Tacoma Intl

$801Multiple Airlines

Thu, Oct 15 - Wed, Oct 28

8:55 am - 9:11 pmLHR London Heathrow-GEG Spokane

20h 16m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

1:21 pm - 10:40 amGEG Spokane-LHR London Heathrow

13h 19m1 stop Seattle/Tacoma Intl

$836Multiple Airlines

Mon, Dec 14 - Tue, Dec 29

12:20 pm - 9:11 pmLHR London Heathrow-GEG Spokane

16h 51m1 stop Seattle/Tacoma Intl

1:21 pm - 10:40 amGEG Spokane-LHR London Heathrow

13h 19m1 stop Seattle/Tacoma Intl

$863Multiple Airlines

Tue, Dec 15 - Tue, Dec 29

12:20 pm - 9:11 pmLHR London Heathrow-GEG Spokane

16h 51m1 stop Seattle/Tacoma Intl

1:21 pm - 10:40 amGEG Spokane-LHR London Heathrow

13h 19m1 stop Seattle/Tacoma Intl

$864Multiple Airlines

Mon, Dec 14 - Tue, Dec 29

8:55 am - 9:11 pmLHR London Heathrow-GEG Spokane

20h 16m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

6:00 am - 10:40 amGEG Spokane-LHR London Heathrow

20h 40m1 stop Seattle/Tacoma Intl

$875Multiple Airlines

Mon, Dec 14 - Mon, Dec 28

11:45 am - 9:25 pmLHR London Heathrow-GEG Spokane

17h 40m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

1:38 pm - 10:40 amGEG Spokane-LHR London Heathrow

14h 02m1 stop Seattle/Tacoma Intl

$880Multiple Airlines

Thu, Oct 15 - Wed, Oct 28

5:45 pm - 11:55 pmLHR London Heathrow-GEG Spokane

14h 10m1 stop Seattle/Tacoma Intl

1:38 pm - 10:40 amGEG Spokane-LHR London Heathrow

14h 02m1 stop Seattle/Tacoma Intl

$900Multiple Airlines

Thu, Oct 15 - Wed, Oct 28

8:55 am - 9:11 pmLHR London Heathrow-GEG Spokane

20h 16m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

1:21 pm - 10:40 amGEG Spokane-LHR London Heathrow

13h 19m1 stop Seattle/Tacoma Intl

$901Multiple Airlines

Mon, Dec 14 - Tue, Dec 29

12:20 pm - 9:11 pmLHR London Heathrow-GEG Spokane

16h 51m1 stop Seattle/Tacoma Intl

6:00 am - 10:40 amGEG Spokane-LHR London Heathrow

20h 40m1 stop Seattle/Tacoma Intl

$903Multiple Airlines

Mon, Dec 14 - Mon, Dec 28

Cheap last minute flights

Enter your travel dates to find the best prices.

6:40 pm - 6:40 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

31h 00m2 stops Kastrup Copenhagen Seattle/Tacoma Intl

12:17 pm - 5:40 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

22h 23m2 stops Seattle/Tacoma Intl Kastrup Copenhagen

$1,074Scandinavian Airlines

Mon, Sep 14 - Tue, Sep 22

9:55 am - 11:00 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

20h 05m1 stop Los Angeles Los Angeles

6:47 pm - 5:35 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 48m1 stop Los Angeles Los Angeles

$1,101Multiple Airlines

Tue, Sep 15 - Thu, Sep 24

3:40 pm - 10:38 pmLGW London Gatwick-BOI Boise Air Term. Gowen Fld

37h 58m2 stops Reykjavik Keflavik Intl Seattle/Tacoma Intl

4:20 pm - 2:40 pmBOI Boise Air Term. Gowen Fld-LGW London Gatwick

15h 20m2 stops Seattle/Tacoma Intl Reykjavik Keflavik Intl

$1,168Icelandair

Thu, Sep 17 - Tue, Sep 22

7:30 pm - 6:40 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

30h 10m2 stops Kastrup Copenhagen Seattle/Tacoma Intl

10:34 am - 1:35 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

20h 01m2 stops Seattle/Tacoma Intl Kastrup Copenhagen

$1,172Scandinavian Airlines

Mon, Sep 14 - Fri, Sep 18

11:40 am - 8:35 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

15h 55m1 stop Seattle/Tacoma Intl

4:20 pm - 3:35 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

16h 15m1 stop Seattle/Tacoma Intl

$1,194Multiple Airlines

Wed, Sep 16 - Tue, Sep 22

1:05 pm - 10:38 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

40h 33m2 stops Reykjavik Keflavik Intl Seattle/Tacoma Intl

1:15 pm - 11:55 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 40m2 stops Seattle/Tacoma Intl Reykjavik Keflavik Intl

$1,219Icelandair

Thu, Sep 17 - Mon, Sep 21

9:25 pm - 10:38 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

56h 13m2 stops Reykjavik Keflavik Intl Seattle/Tacoma Intl

1:15 pm - 11:55 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 40m2 stops Seattle/Tacoma Intl Reykjavik Keflavik Intl

$1,220Icelandair

Wed, Sep 16 - Mon, Sep 21

11:40 am - 6:07 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

13h 27m1 stop Seattle/Tacoma Intl

2:16 pm - 11:20 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

14h 04m1 stop Seattle/Tacoma Intl

$1,259Multiple Airlines

Tue, Sep 15 - Wed, Sep 23

5:00 pm - 11:44 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

13h 44m1 stop Seattle/Tacoma Intl

4:20 pm - 3:05 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 45m1 stop Seattle/Tacoma Intl

$1,283Alaska Airlines

Thu, Sep 17 - Sun, Sep 20

11:40 am - 6:07 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

13h 27m1 stop Seattle/Tacoma Intl

5:52 pm - 3:35 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

14h 43m1 stop Seattle/Tacoma Intl

$1,313Multiple Airlines

Tue, Sep 15 - Mon, Sep 21

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Scandinavian Airlines flights from London to Idaho

Our best Scandinavian Airlines deals on London to Idaho flight tickets

Scandinavian Airlines

Sep 21

LHR7:30 pmLondon Heathrow

34h 04m

2 stops

BOI10:34 pmBoise Air Term. Gowen Fld

Oct 6

BOI10:34 amBoise Air Term. Gowen Fld

24h 06m

2 stops

LHR5:40 pmLondon Heathrow

$917

Scandinavian Airlines

Sep 14

LHR6:40 pmLondon Heathrow

31h 00m

2 stops

BOI6:40 pmBoise Air Term. Gowen Fld

Sep 22

BOI12:17 pmBoise Air Term. Gowen Fld

22h 23m

2 stops

LHR5:40 pmLondon Heathrow

$1,074

Scandinavian Airlines

Sep 21

LHR9:05 pmLondon Heathrow

28h 35m

3 stops

BOI6:40 pmBoise Air Term. Gowen Fld

Oct 6

BOI12:08 pmBoise Air Term. Gowen Fld

26h 32m

2 stops

LHR9:40 pmLondon Heathrow

$1,150

Icelandair flights from London to Idaho

Our best Icelandair deals on London to Idaho flight tickets

Icelandair

Sep 17

LGW3:40 pmLondon Gatwick

37h 58m

2 stops

BOI10:38 pmBoise Air Term. Gowen Fld

Sep 22

BOI4:20 pmBoise Air Term. Gowen Fld

15h 20m

2 stops

LGW2:40 pmLondon Gatwick

$1,168

Icelandair

Sep 17

LHR1:05 pmLondon Heathrow

40h 33m

2 stops

BOI10:38 pmBoise Air Term. Gowen Fld

Sep 21

BOI1:15 pmBoise Air Term. Gowen Fld

15h 40m

2 stops

LHR11:55 amLondon Heathrow

$1,219

Icelandair

Sep 16

LHR9:25 pmLondon Heathrow

56h 13m

2 stops

BOI10:38 pmBoise Air Term. Gowen Fld

Sep 21

BOI1:15 pmBoise Air Term. Gowen Fld

15h 40m

2 stops

LHR11:55 amLondon Heathrow

$1,220

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Thu 10/15

5:45 pm-11:55 pm

1 stop14h 10m

Spokane

Wed 10/28

1:38 pm-10:40 am

1 stop14h 02m

$738

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Thu 10/15

11:45 am-11:55 pm

2 stops20h 10m

Spokane

Wed 10/28

1:38 pm-10:40 am

1 stop14h 02m

$801

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 12/14

8:55 am-9:11 pm

2 stops20h 16m

Spokane

Tue 12/29

1:21 pm-10:40 am

1 stop13h 19m

$836

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Tue 12/15

12:20 pm-9:11 pm

1 stop16h 51m

Spokane

Tue 12/29

1:21 pm-10:40 am

1 stop13h 19m

$863

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 12/14

12:20 pm-9:11 pm

1 stop16h 51m

Spokane

Tue 12/29

1:21 pm-10:40 am

1 stop13h 19m

$864

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 12/14

8:55 am-9:11 pm

2 stops20h 16m

Spokane

Mon 12/28

6:00 am-10:40 am

1 stop20h 40m

$875

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Thu 10/15

11:45 am-9:25 pm

2 stops17h 40m

Spokane

Wed 10/28

1:38 pm-10:40 am

1 stop14h 02m

$880

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Thu 10/15

5:45 pm-11:55 pm

1 stop14h 10m

Spokane

Wed 10/28

1:38 pm-10:40 am

1 stop14h 02m

$900

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 12/14

8:55 am-9:11 pm

2 stops20h 16m

Spokane

Tue 12/29

1:21 pm-10:40 am

1 stop13h 19m

$901

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 12/14

12:20 pm-9:11 pm

1 stop16h 51m

Spokane

Mon 12/28

6:00 am-10:40 am

1 stop20h 40m

$903

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London to Idaho

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

Prices

Airlines

What is the cheapest month to fly to Idaho?

In general, April is the cheapest month to fly from London to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $847. If you don’t want to visit Idaho in April, then you should wait until March to fly from London, when ticket prices are also cheap, with an average price of $874.

Can stopping save me money on London to Idaho flights?

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

Cheap London to Idaho flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Idaho

Best Price Found	$504
Fastest flight time	14h 18m
Direct flights	None

The best one-way flight to Idaho from London in the past 72 hours is $504. The best round-trip flight deal from London to Idaho found on momondo in the last 72 hours is $738.

The fastest flight from London to Idaho takes 14h 18m

There are no direct flights from London to Idaho. There are no popular flight routes from London to Idaho.

Search flight deals

Frequently asked questions about flying from London to Idaho

When did momondo last update prices for flights from London to Idaho?
Prices for flights from London to Idaho refresh daily.
How old do you have to be to fly from London to Idaho?
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 to Idaho.
What documentation or ID do you need to fly to Idaho?
The required travel and health documents for your Idaho 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. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

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

It is quick and easy to find London to Idaho flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Idaho that suits you.

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

Flights from London to Idaho with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Idaho from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from London to Idaho now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Idaho and let you know when they change.