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 25m 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.

£380 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

United Airlines

16 Sept

LHR

20h 00m

2 stops

BOI

20 Sept

BOI

38h 08m

2 stops

LHR

£655

United Airlines

8 Sept

LHR

20h 49m

2 stops

BOI

22 Sept

BOI

15h 17m

2 stops

LHR

£655

United Airlines

16 Sept

LHR

20h 00m

2 stops

BOI

20 Sept

BOI

29h 24m

1 stop

LHR

£659

Lufthansa

8 Sept

LHR

13h 35m

1 stop

BOI

22 Sept

BOI

11h 56m

1 stop

LHR

£661

Scandinavian Airlines

5 Sept

LHR

18h 55m

2 stops

BOI

19 Sept

BOI

24h 17m

2 stops

LHR

£689

United Airlines

16 Sept

LHR

14h 35m

1 stop

BOI

20 Sept

BOI

16h 10m

1 stop

LHR

£708

United Airlines

16 Sept

LHR

18h 07m

1 stop

BOI

20 Sept

BOI

16h 03m

1 stop

LHR

£708

United Airlines

16 Sept

LHR

14h 35m

1 stop

BOI

20 Sept

BOI

11h 56m

1 stop

LHR

£709

Lufthansa

9 Oct

LHR

13h 26m

1 stop

BOI

23 Oct

BOI

16h 01m

1 stop

LHR

£711

United Airlines

9 Oct

LHR

17h 30m

2 stops

BOI

23 Oct

BOI

18h 55m

2 stops

LHR

£714

Scandinavian Airlines

30 May

LHR

20h 54m

2 stops

BOI

6 Jun

BOI

23h 35m

3 stops

LHR

£720

Scandinavian Airlines

2 Oct

EDI

30h 25m

2 stops

BOI

6 Oct

BOI

24h 47m

2 stops

EDI

£722

Flights to Idaho Falls

Search all flight deals to Idaho Falls

Multiple Airlines

1 Sept

LHR

16h 51m

2 stops

IDA

25 Sept

IDA

22h 37m

2 stops

LHR

£769

Icelandair

1 Sept

LHR

16h 51m

2 stops

IDA

25 Sept

IDA

22h 37m

2 stops

LHR

£795

Multiple Airlines

1 Sept

LHR

16h 51m

2 stops

IDA

25 Sept

IDA

23h 35m

2 stops

LHR

£806

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

25h 22m

2 stops

LGW

£806

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

25h 22m

2 stops

LGW

£808

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

25h 22m

2 stops

LGW

£821

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

20h 50m

1 stop

LHR

£834

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

20h 50m

1 stop

LHR

£835

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

20h 50m

1 stop

LHR

£836

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

13h 50m

1 stop

LHR

£841

Multiple Airlines

1 Sept

LHR

27h 55m

1 stop

IDA

25 Sept

IDA

13h 35m

1 stop

LHR

£844

Multiple Airlines

1 Sept

LHR

27h 55m

1 stop

IDA

25 Sept

IDA

13h 35m

1 stop

LHR

£845

Flights to Hailey

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Virgin Atlantic

27 May

LHR

35h 14m

2 stops

SUN

3 Jun

SUN

16h 31m

2 stops

LHR

£857

Virgin Atlantic

27 May

LHR

35h 14m

2 stops

SUN

3 Jun

SUN

14h 21m

1 stop

LHR

£874

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,056

United Airlines

27 May

LHR

36h 36m

1 stop

SUN

3 Jun

SUN

12h 02m

1 stop

LHR

£1,059

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,059

Delta

15 Jul

LHR

24h 43m

2 stops

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,063

Multiple Airlines

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

17h 35m

2 stops

LHR

£1,068

Multiple Airlines

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

17h 35m

2 stops

LHR

£1,070

Delta

15 Jul

LHR

18h 13m

1 stop

SUN

3 Aug

SUN

19h 40m

1 stop

LHR

£1,107

Delta

15 Jul

LHR

18h 13m

1 stop

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,109

KLM

15 Jul

LHR

18h 13m

1 stop

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,114

Multiple Airlines

15 Jul

LHR

32h 58m

3 stops

SUN

3 Aug

SUN

21h 30m

3 stops

LHR

£1,654

Find the cheapest flights from the United Kingdom to Idaho

Round-trip

One-way

Last minute

Recent return flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

10:50 - 23:50

LHR

BOI

20h 00m

2 stops

19:01 - 07:25

BOI

LHR

29h 24m

1 stop

£655United Airlines

Wed, 16 Sep - Sun, 20 Sep

07:30 - 21:19

LHR

BOI

20h 49m

2 stops

12:23 - 10:40

BOI

LHR

15h 17m

2 stops

£655United Airlines

Tue, 8 Sep - Tue, 22 Sep

10:50 - 23:50

LHR

BOI

20h 00m

2 stops

10:37 - 07:45

BOI

LHR

38h 08m

2 stops

£659United Airlines

Wed, 16 Sep - Sun, 20 Sep

14:50 - 21:25

LHR

BOI

13h 35m

1 stop

14:44 - 09:40

BOI

LHR

11h 56m

1 stop

£661Lufthansa

Tue, 8 Sep - Tue, 22 Sep

14:50 - 21:09

LHR

GEG

14h 19m

1 stop

12:30 - 11:10

GEG

LHR

14h 40m

1 stop

£691Lufthansa

Fri, 9 Oct - Mon, 12 Oct

19:15 - 18:23

LHR

GEG

31h 08m

2 stops

16:15 - 12:10

GEG

LHR

11h 55m

1 stop

£725Virgin Atlantic

Mon, 4 May - Mon, 18 May

13:05 - 22:56

LHR

IDA

16h 51m

2 stops

06:18 - 11:55

IDA

LHR

22h 37m

2 stops

£795Icelandair

Tue, 1 Sep - Fri, 25 Sep

15:40 - 22:33

LGW

BOI

37h 53m

2 stops

16:17 - 14:40

BOI

LGW

15h 23m

2 stops

£809Icelandair

Sat, 5 Sep - Sat, 19 Sep

09:20 - 23:00

LCY

BOI

20h 40m

2 stops

18:41 - 18:30

BOI

LCY

16h 49m

2 stops

£844KLM

Tue, 5 May - Wed, 13 May

11:00 - 18:14

MAN

IDA

38h 14m

2 stops

15:16 - 08:15

IDA

MAN

57h 59m

2 stops

£913Virgin Atlantic

Sat, 9 May - Sat, 16 May

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 16/9

10:50-23:50

2 stops20h 00m

Boise Air Term. Gowen Fld

Sun 20/9

19:01-07:25

1 stop29h 24m

£655

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 8/9

07:30-21:19

2 stops20h 49m

Boise Air Term. Gowen Fld

Tue 22/9

12:23-10:40

2 stops15h 17m

£655

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 16/9

10:50-23:50

2 stops20h 00m

Boise Air Term. Gowen Fld

Sun 20/9

10:37-07:45

2 stops38h 08m

£659

Fastest return journey

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 8/9

14:50-21:25

1 stop13h 35m

Boise Air Term. Gowen Fld

Tue 22/9

14:44-09:40

1 stop11h 56m

£661

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 9/10

14:50-21:09

1 stop14h 19m

Spokane

Mon 12/10

12:30-11:10

1 stop14h 40m

£691

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/5

19:15-18:23

2 stops31h 08m

Spokane

Mon 18/5

16:15-12:10

1 stop11h 55m

£725

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

13:05-22:56

2 stops16h 51m

Idaho Falls Fanning Field

Fri 25/9

06:18-11:55

2 stops22h 37m

£795

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Sat 5/9

15:40-22:33

2 stops37h 53m

Boise Air Term. Gowen Fld

Sat 19/9

16:17-14:40

2 stops15h 23m

£809

LondonBoise

LCY - BOI

LCYBOI

London City

Tue 5/5

09:20-23:00

2 stops20h 40m

Boise Air Term. Gowen Fld

Wed 13/5

18:41-18:30

2 stops16h 49m

£844

ManchesterIdaho Falls

MAN - IDA

MANIDA

Manchester

Sat 9/5

11:00-18:14

2 stops38h 14m

Idaho Falls Fanning Field

Sat 16/5

15:16-08:15

2 stops57h 59m

£913

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 KLM 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	£380
Best Round-Trip Price	£655
Fastest flight time	20h 12m

The best one-way flight price to Idaho from United Kingdom in the last 72 hours is £380 (London Gatwick to Boise Air Term. Gowen Fld).

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The best round-trip flight price to Idaho from United Kingdom in the last 72 hours is £655 (London Heathrow to Boise Air Term. Gowen Fld).

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The fastest flight to Idaho from United Kingdom takes 20h 12m (London City to Boise Air Term. Gowen Fld).

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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 £304/per person and the cheapest flight to Idaho is £217/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?

76% 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 KLM 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 April 2026, there are 8 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.