How long is the flight from United Kingdom to Idaho?

Flight times from United Kingdom to Idaho vary, but if you’re flying out of London Heathrow and flying into Boise Air Term. Gowen Fld (one of the most popular routes), then the duration is 17h 50m on average. Another popular route from United Kingdom to Idaho is flying from Manchester to Boise Air Term. Gowen Fld, which will take roughly . Keep in mind that layovers or delays could extend your travel time.

£351 Cheap Flights to Idaho in 2026

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Recent flights found to popular cities in Idaho

Find flights to these popular cities in Idaho from your nearest airport.

Flights to Boise

Search all flight deals to Boise

Scandinavian Airlines

11 Sept

LHR

19h 00m

2 stops

BOI

26 Sept

BOI

24h 06m

2 stops

LHR

£580

Scandinavian Airlines

11 Sept

LHR

28h 35m

3 stops

BOI

26 Sept

BOI

22h 23m

2 stops

LHR

£586

Scandinavian Airlines

4 Dec

LHR

23h 14m

2 stops

BOI

7 Dec

BOI

40h 46m

2 stops

LHR

£590

Scandinavian Airlines

4 Dec

LHR

23h 14m

2 stops

BOI

7 Dec

BOI

40h 46m

2 stops

LHR

£591

Scandinavian Airlines

4 Dec

LHR

23h 14m

2 stops

BOI

7 Dec

BOI

40h 46m

2 stops

LHR

£601

Scandinavian Airlines

4 Dec

LHR

23h 14m

2 stops

BOI

7 Dec

BOI

40h 46m

2 stops

LHR

£602

Scandinavian Airlines

11 Sept

LHR

22h 54m

2 stops

BOI

26 Sept

BOI

24h 56m

2 stops

LHR

£621

Scandinavian Airlines

11 Sept

LHR

28h 35m

3 stops

BOI

26 Sept

BOI

28h 06m

2 stops

LHR

£626

Scandinavian Airlines

10 Nov

EDI

34h 44m

2 stops

BOI

15 Nov

BOI

19h 11m

2 stops

EDI

£634

Scandinavian Airlines

11 Nov

EDI

34h 44m

2 stops

BOI

15 Nov

BOI

19h 11m

2 stops

EDI

£635

Multiple Airlines

2 Oct

LHR

18h 28m

1 stop

BOI

17 Oct

BOI

21h 03m

2 stops

LHR

£639

Multiple Airlines

2 Oct

LHR

18h 28m

1 stop

BOI

17 Oct

BOI

36h 43m

3 stops

LHR

£643

Flights to Idaho Falls

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Alaska Airlines

22 Sept

LHR

29h 20m

1 stop

IDA

29 Sept

IDA

18h 04m

1 stop

LHR

£788

Alaska Airlines

4 Nov

LHR

31h 32m

1 stop

IDA

8 Nov

IDA

23h 16m

1 stop

LHR

£803

Alaska Airlines

1 Sept

LHR

29h 20m

1 stop

IDA

25 Sept

IDA

18h 04m

1 stop

LHR

£815

Alaska Airlines

1 Sept

LHR

29h 20m

1 stop

IDA

25 Sept

IDA

18h 04m

1 stop

LHR

£827

Alaska Airlines

1 Sept

LHR

29h 20m

1 stop

IDA

25 Sept

IDA

25h 47m

1 stop

LHR

£832

Alaska Airlines

1 Sept

LHR

29h 20m

1 stop

IDA

25 Sept

IDA

25h 47m

1 stop

LHR

£834

Virgin Atlantic

17 Sept

LHR

14h 22m

1 stop

IDA

24 Sept

IDA

17h 00m

2 stops

LHR

£834

Finnair

17 Sept

LHR

19h 25m

1 stop

IDA

24 Sept

IDA

15h 17m

1 stop

LHR

£839

Delta

1 Sept

LHR

19h 05m

2 stops

IDA

25 Sept

IDA

21h 00m

1 stop

LHR

£857

Multiple Airlines

17 Sept

LHR

18h 47m

2 stops

IDA

24 Sept

IDA

19h 30m

2 stops

LHR

£861

Delta

1 Sept

LHR

19h 05m

2 stops

IDA

25 Sept

IDA

18h 13m

2 stops

LHR

£863

American Airlines

17 Sept

LHR

17h 20m

1 stop

IDA

24 Sept

IDA

13h 50m

1 stop

LHR

£865

Flights to Hailey

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Virgin Atlantic

19 Sept

LHR

19h 32m

2 stops

SUN

26 Sept

SUN

11h 41m

1 stop

LHR

£888

Find the cheapest flights from the United Kingdom to Idaho

Return

One-way

Last minute

Recent return flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

06:40 - 19:14LHR London Heathrow-GEG Spokane

20h 34m2 stops Kastrup Copenhagen Seattle/Tacoma Intl

13:00 - 16:00GEG Spokane-LHR London Heathrow

19h 00m2 stops Seattle/Tacoma Intl Kastrup Copenhagen

£566Scandinavian Airlines

Fri, 4 Sep - Fri, 11 Sep

06:40 - 17:09LHR London Heathrow-GEG Spokane

18h 29m2 stops Kastrup Copenhagen Seattle/Tacoma Intl

13:00 - 16:00GEG Spokane-LHR London Heathrow

19h 00m2 stops Seattle/Tacoma Intl Kastrup Copenhagen

£566Scandinavian Airlines

Tue, 22 Sep - Tue, 29 Sep

16:40 - 22:36LHR London Heathrow-GEG Spokane

37h 56m2 stops Washington, D.C. Dulles Intl San Francisco

05:00 - 09:00GEG Spokane-LHR London Heathrow

20h 00m2 stops Denver Intl Chicago O'Hare Intl

£685United Airlines

Tue, 1 Sep - Tue, 8 Sep

16:40 - 22:36LHR London Heathrow-GEG Spokane

37h 56m2 stops Washington, D.C. Dulles Intl San Francisco

13:37 - 12:25GEG Spokane-LHR London Heathrow

14h 48m1 stop Denver Intl

£685United Airlines

Tue, 1 Sep - Tue, 8 Sep

07:30 - 22:53LHR London Heathrow-BOI Boise Air Term. Gowen Fld

22h 23m2 stops Frankfurt am Main Chicago O'Hare Intl

10:30 - 14:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

21h 10m2 stops Denver Intl Frankfurt am Main

£713Lufthansa

Mon, 21 Sep - Mon, 28 Sep

14:50 - 21:35LHR London Heathrow-BOI Boise Air Term. Gowen Fld

13h 45m1 stop Denver Intl

14:44 - 09:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

11h 56m1 stop Denver Intl

£727Lufthansa

Wed, 7 Oct - Thu, 15 Oct

20:55 - 17:09LHR London Heathrow-GEG Spokane

28h 14m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

06:22 - 08:50GEG Spokane-LHR London Heathrow

18h 28m2 stops Los Angeles Los Angeles New York John F Kennedy Intl

£736Virgin Atlantic

Tue, 8 Sep - Wed, 16 Sep

20:55 - 17:09LHR London Heathrow-GEG Spokane

28h 14m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

15:30 - 13:50GEG Spokane-LHR London Heathrow

14h 20m2 stops Seattle/Tacoma Intl Amsterdam Schiphol

£740Virgin Atlantic

Tue, 8 Sep - Tue, 6 Oct

17:00 - 23:59LHR London Heathrow-BOI Boise Air Term. Gowen Fld

13h 59m1 stop Seattle/Tacoma Intl

16:18 - 15:05BOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 47m1 stop Seattle/Tacoma Intl

£781Alaska Airlines

Wed, 7 Oct - Tue, 13 Oct

17:00 - 23:59LHR London Heathrow-BOI Boise Air Term. Gowen Fld

13h 59m1 stop Seattle/Tacoma Intl

16:18 - 15:05BOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 47m1 stop Seattle/Tacoma Intl

£781Alaska Airlines

Wed, 7 Oct - Wed, 14 Oct

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Fri 4/9

06:40-19:14

2 stops20h 34m

Spokane

Fri 11/9

13:00-16:00

2 stops19h 00m

£566

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Tue 22/9

06:40-17:09

2 stops18h 29m

Spokane

Tue 29/9

13:00-16:00

2 stops19h 00m

£566

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Tue 1/9

16:40-22:36

2 stops37h 56m

Spokane

Tue 8/9

05:00-09:00

2 stops20h 00m

£685

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Tue 1/9

16:40-22:36

2 stops37h 56m

Spokane

Tue 8/9

13:37-12:25

1 stop14h 48m

£685

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 21/9

07:30-22:53

2 stops22h 23m

Boise Air Term. Gowen Fld

Mon 28/9

10:30-14:40

2 stops21h 10m

£713

Fastest return journey

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 7/10

14:50-21:35

1 stop13h 45m

Boise Air Term. Gowen Fld

Thu 15/10

14:44-09:40

1 stop11h 56m

£727

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Tue 8/9

20:55-17:09

2 stops28h 14m

Spokane

Wed 16/9

06:22-08:50

2 stops18h 28m

£736

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Tue 8/9

20:55-17:09

2 stops28h 14m

Spokane

Tue 6/10

15:30-13:50

2 stops14h 20m

£740

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 7/10

17:00-23:59

1 stop13h 59m

Boise Air Term. Gowen Fld

Tue 13/10

16:18-15:05

1 stop15h 47m

£781

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 7/10

17:00-23:59

1 stop13h 59m

Boise Air Term. Gowen Fld

Wed 14/10

16:18-15:05

1 stop15h 47m

£781

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

Idaho flights insights and trends

Explore insights for your Idaho flight to craft the best travel plan

Airlines

Other information

Which airlines fly to Idaho?

United Airlines, Virgin Atlantic and Icelandair are the top three most popular airlines that fly to Idaho from United Kingdom according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when travelling to Idaho. Keep in mind that there are 7 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

Cheapest flights to cities in Idaho

Click on the cities below to find out when it's cheapest to fly to Idaho from United Kingdom

Boise

Find flights to Boise

Cheap Idaho flight deals and tips

Summary info about Idaho flight prices, duration and airlines

Best One-Way Price	£351
Best Round-Trip Price	£566
Fastest flight time	16h 15m

The best one-way flight price to Idaho from United Kingdom in the last 5 days is £351 (London Gatwick to Boise Air Term. Gowen Fld).

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The best return flight price to Idaho from United Kingdom in the last 5 days is £566 (London Heathrow to Spokane).

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The fastest flight to Idaho from United Kingdom takes 16h 15m (London Gatwick to Spokane).

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Frequently asked questions about flying to Idaho

What is the cheapest flight I can find to Idaho?

The average flight to Idaho costs £394/per person and the cheapest flight to Idaho is £303/per person. This price varies based on a multitude of factors such as departure airport, airline, time of booking and when you plan on travelling.

What is the best airport to fly into to visit Boise?

83% of momondo users visit Boise more often than any other city in Idaho. When travelling to Boise, typically the most convenient airport to fly into is Boise Airport.

What is the weather like in Idaho?

Temperatures in Idaho can vary between -1 °C and 24 °C based on the time of year. Typically, the coldest month in Idaho will be December, and the warmest month will be July. It is also worth noting that those looking to avoid rain and/or snow should consider travelling to Idaho in August, July, and September, as that is when precipitation is least likely.

Which airlines fly to Idaho?

Of the 7 airlines that fly to Idaho, United Airlines, Virgin Atlantic and Lufthansa happen to be the most favoured based on our user data. United Airlines is the most popular among the three airlines, with 45% of users choosing them for their travels to Idaho.

When did momondo last update prices for flights to Idaho?

Prices for flights to Idaho were last updated today.

How many operators does momondo search for flights to Idaho?

As of August 2026, there are 7 operators available to choose from for flights to Idaho.

How old do you have to be to fly 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 to Idaho.

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

The travel and health documents you'll need for your trip to Idaho 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

Finding the right flight to Idaho is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. These options can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Idaho quick and easy, saving you time and money.

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

Yes. All flights to Idaho on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights to Idaho?

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 to Idaho.

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

Yes. momondo can track flight prices for Idaho and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.