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Cheap flights from Idaho to London from £274

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho to London departing on 6/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
13:46 - 10:30BOI-LHR
13h 44m1 stop
Virgin Atlantic Logo
11:20 - 22:49LHR-BOI
18h 29m1 stop
£433Virgin Atlantic
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Tue, 17 Feb - Thu, 26 Feb
Virgin Atlantic Logo
16:49 - 12:50BOI-LHR
13h 01m1 stop
Virgin Atlantic Logo
14:45 - 23:59LHR-BOI
16h 14m1 stop
£435Virgin Atlantic
Find Deal
Tue, 17 Feb - Thu, 26 Feb
KLM Logo
07:00 - 10:00JAC-LHR
20h 00m1 stop
KLM Logo
20:25 - 17:05LHR-JAC
27h 40m2 stops
£453KLM
Find Deal
Wed, 3 Dec - Mon, 8 Dec
Delta Logo
11:44 - 10:30BOI-LHR
15h 46m1 stop
Delta Logo
06:20 - 18:51LHR-BOI
19h 31m2 stops
£453Delta
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Tue, 2 Dec - Tue, 9 Dec
KLM Logo
07:00 - 07:05JAC-LHR
17h 05m2 stops
KLM Logo
20:25 - 17:05LHR-JAC
27h 40m2 stops
£456KLM
Find Deal
Wed, 3 Dec - Mon, 8 Dec
Delta Logo
11:19 - 10:00BOI-LHR
15h 41m1 stop
Delta Logo
06:20 - 18:28LHR-BOI
19h 08m2 stops
£458Delta
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Tue, 17 Feb - Thu, 26 Feb
United Airlines Logo
05:00 - 05:55BOI-LHR
17h 55m2 stops
United Airlines Logo
11:10 - 23:48LHR-BOI
19h 38m2 stops
£472United Airlines
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Tue, 17 Feb - Thu, 26 Feb
United Airlines Logo
16:25 - 07:10JAC-LHR
31h 45m2 stops
United Airlines Logo
06:35 - 20:37LHR-JAC
21h 02m2 stops
£473United Airlines
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Thu, 4 Dec - Thu, 11 Dec
Air France Logo
14:04 - 11:40BOI-LHR
14h 36m1 stop
Air France Logo
11:20 - 21:25LHR-BOI
17h 05m1 stop
£476Air France
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Fri, 5 Dec - Wed, 24 Dec
Air France Logo
05:35 - 07:05BOI-LHR
18h 30m1 stop
Air France Logo
10:45 - 17:15LHR-BOI
13h 30m1 stop
£496Air France
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Tue, 18 Nov - Sun, 23 Nov

Lufthansa flights from Idaho to London Heathrow Airport

Our best Lufthansa deals on Idaho to London Heathrow Airport flight tickets
Lufthansa
23 Mar
BOI14:43Boise Air Term. Gowen Fld
20h 22m
2 stops
LHR17:05London Heathrow
8 Apr
LHR06:55London Heathrow
18h 00m
2 stops
BOI17:55Boise Air Term. Gowen Fld
£559
Find similar
Lufthansa
25 Mar
JAC14:30Jackson Hole
22h 05m
2 stops
LHR18:35London Heathrow
31 Mar
LHR07:25London Heathrow
20h 37m
2 stops
JAC21:02Jackson Hole
£567
Find similar
Lufthansa
24 Mar
JAC14:30Jackson Hole
18h 15m
2 stops
LHR14:45London Heathrow
3 Apr
LHR06:55London Heathrow
21h 07m
2 stops
JAC21:02Jackson Hole
£568
Find similar

Scandinavian Airlines flights from Idaho to London Heathrow Airport

Our best Scandinavian Airlines deals on Idaho to London Heathrow Airport flight tickets
Scandinavian Airlines
25 Apr
BOI13:00Boise Air Term. Gowen Fld
21h 40m
2 stops
LHR17:40London Heathrow
4 May
LHR06:40London Heathrow
23h 24m
2 stops
BOI23:04Boise Air Term. Gowen Fld
£560
Find similar
Scandinavian Airlines
9 Nov
BOI15:54Boise Air Term. Gowen Fld
18h 46m
2 stops
LHR17:40London Heathrow
11 Nov
LHR10:20London Heathrow
19h 19m
2 stops
BOI22:39Boise Air Term. Gowen Fld
£1,609
Find similar
Scandinavian Airlines
9 Nov
BOI15:54Boise Air Term. Gowen Fld
18h 46m
2 stops
LHR17:40London Heathrow
11 Nov
LHR06:40London Heathrow
22h 59m
3 stops
BOI22:39Boise Air Term. Gowen Fld
£1,618
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Idaho to London Heathrow Airport 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 279,928 searches. Data last updated 6 November 2025.
Use the filters below to find and compare flights from Idaho to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

13:46-10:30

1 stop13h 44m

London Heathrow

Thu 26/2

11:20-22:49

1 stop18h 29m

£433

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

16:49-12:50

1 stop13h 01m

London Heathrow

Thu 26/2

14:45-23:59

1 stop16h 14m

£435

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 3/12

07:00-10:00

1 stop20h 00m

London Heathrow

Mon 8/12

20:25-17:05

2 stops27h 40m

£453

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/12

11:44-10:30

1 stop15h 46m

London Heathrow

Tue 9/12

06:20-18:51

2 stops19h 31m

£453

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 3/12

07:00-07:05

2 stops17h 05m

London Heathrow

Mon 8/12

20:25-17:05

2 stops27h 40m

£456

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

11:19-10:00

1 stop15h 41m

London Heathrow

Thu 26/2

06:20-18:28

2 stops19h 08m

£458

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

05:00-05:55

2 stops17h 55m

London Heathrow

Thu 26/2

11:10-23:48

2 stops19h 38m

£472

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Thu 4/12

16:25-07:10

2 stops31h 45m

London Heathrow

Thu 11/12

06:35-20:37

2 stops21h 02m

£473

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Fri 5/12

14:04-11:40

1 stop14h 36m

London Heathrow

Wed 24/12

11:20-21:25

1 stop17h 05m

£476

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 18/11

05:35-07:05

1 stop18h 30m

London Heathrow

Sun 23/11

10:45-17:15

1 stop13h 30m

£496

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Idaho to London Heathrow Airport

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

What is the cheapest month to fly to London Heathrow Airport?

In general, April is the cheapest month to fly from Idaho to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £614. The month of August is another great option to travel to London Heathrow Airport, with average flight prices from Idaho averaging around £619.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Idaho is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £559. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £1,150.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Idaho to London Heathrow Airport in the evening for as low as £524. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are £921 on average. Flights to London Heathrow Airport from Idaho at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Idaho when booking week ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £720 when searching week before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Idaho for as low as £479 on momondo.

Cheap Idaho to London Heathrow Airport flight deals and tips

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

Direct flights

None
There are no direct flights from Idaho to London Heathrow Airport. There are no popular flight routes from Idaho to London Heathrow Airport.
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  • When did momondo last update prices for flights from Idaho to London Heathrow Airport?

    Prices for flights from Idaho to London Heathrow Airport are updated daily.

  • How many operators does momondo search for flights from Idaho to London Heathrow Airport?

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

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Northampton
Swindon
Canterbury
Stratford-upon-Avon
Southend-on-Sea
Ipswich
Ilford
Poole
Guildford
Swanage
Dover
Colchester
Chelmsford
Hayes

Why use momondo?

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

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 Idaho to London for you.

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

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

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

Once all potential Idaho to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

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

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