Cheap flights from London to Boise from £351

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
8 Sep — 15 Sep1
1 adult

Cheapflights Tip: The best prices from London to Boise Air Term. Gowen Fld are usually found in February or March, booked 20 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from London to Boise

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Boise (BOI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 3 September 2025.

Round-trip from

£540

One-way from

£351

Popular in

July

Cheapest in

February

Average price

£645
United Airlines
  • United Airlines
  • 21/11-30/11
  • 3 total stops
  • 56h 03m total
  • London to Boise
14/9
  • 14/9
  • 3 total stops
  • 43h 51m total
  • London to Boise
Highest demand for flights based on searches. 15% potential increase in price (£95 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£16 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from London to Boise

Cheapest flights from London to Boise
Explore the most affordable flight options available from London to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 September 2025.

Fri 21/1106:35LHR - BOI
2 stops34h 23mUnited Airlines
Sun 30/1105:00BOI - LHR
1 stop21h 40mUnited Airlines
Deal found 3/9£540
Fri 26/916:00LHR - BOI
2 stops26h 39mMultiple Airlines
Mon 6/1014:39BOI - LHR
1 stop12h 01mMultiple Airlines
Deal found 3/9£563
Fri 26/911:25LHR - BOI
1 stop18h 05mUnited Airlines
Mon 6/1008:20BOI - LHR
1 stop17h 00mUnited Airlines
Deal found 3/9£564
Mon 6/1014:30LHR - BOI
1 stop15h 22mVirgin Atlantic
Mon 13/1013:00BOI - LHR
1 stop13h 50mVirgin Atlantic
Deal found 1/9£566
Mon 15/914:50LHR - BOI
1 stop13h 24mLufthansa
Wed 24/912:27BOI - LHR
1 stop12h 53mLufthansa
Deal found 31/8£568
Mon 6/1017:40LHR - BOI
2 stops32h 07mUnited Airlines
Mon 13/1010:45BOI - LHR
1 stop15h 55mUnited Airlines
Deal found 3/9£569
Fri 17/1010:55LGW - BOI
1 stop19h 01mMultiple Airlines
Fri 24/1010:15BOI - LGW
2 stops17h 40mMultiple Airlines
Deal found 2/9£614
Mon 15/919:10LCY - BOI
2 stops29h 49mLufthansa
Wed 24/912:27BOI - LCY
2 stops20h 58mLufthansa
Deal found 31/8£651
Mon 8/1211:55LGW - BOI
2 stops18h 01mMultiple Airlines
Tue 16/1212:19BOI - LGW
2 stops15h 36mMultiple Airlines
Deal found 3/9£667
Mon 8/1219:40LGW - BOI
2 stops32h 44mIberia
Tue 16/1206:44BOI - LGW
2 stops29h 16mIberia
Deal found 1/9£686
Mon 8/1207:45LCY - BOI
2 stops23h 25mVirgin Atlantic
Tue 16/1213:56BOI - LCY
2 stops20h 24mVirgin Atlantic
Deal found 3/9£712
Mon 6/1015:40LGW - BOI
2 stops38h 25mMultiple Airlines
Mon 13/1006:30BOI - LGW
2 stops25h 05mMultiple Airlines
Deal found 3/9£722

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Boise 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, Cheapflights users made 858,174 searches. Data last updated 3 September 2025.
Use the filters below to find and compare flights from London to Boise that are best for you.

Fly from

London

Fly to

Boise

Route

Depart

Return

Price

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 21/11

06:35-09:58

2 stops34h 23m

Boise Air Term. Gowen Fld

Sun 30/11

05:00-09:40

1 stop21h 40m

£540

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 26/9

16:00-11:39

2 stops26h 39m

Boise Air Term. Gowen Fld

Mon 6/10

14:39-09:40

1 stop12h 01m

£563

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 6/10

17:25-00:08

1 stop13h 43m

Boise Air Term. Gowen Fld

Mon 13/10

07:45-10:00

1 stop19h 15m

£563

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 8/12

12:20-22:16

1 stop16h 56m

Boise Air Term. Gowen Fld

Tue 16/12

15:54-16:50

1 stop17h 56m

£563

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 26/9

11:25-22:30

1 stop18h 05m

Boise Air Term. Gowen Fld

Mon 6/10

08:20-08:20

1 stop17h 00m

£564

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Fri 17/10

10:55-22:56

1 stop19h 01m

Boise Air Term. Gowen Fld

Fri 24/10

10:15-10:55

2 stops17h 40m

£614

LondonBoise

LCY - BOI

LCYBOI

London City

Mon 15/9

19:10-17:59

2 stops29h 49m

Boise Air Term. Gowen Fld

Wed 24/9

12:27-16:25

2 stops20h 58m

£651

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Mon 8/12

11:55-22:56

2 stops18h 01m

Boise Air Term. Gowen Fld

Tue 16/12

12:19-10:55

2 stops15h 36m

£667

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Mon 8/12

19:40-21:24

2 stops32h 44m

Boise Air Term. Gowen Fld

Tue 16/12

06:44-19:00

2 stops29h 16m

£686

LondonBoise

LCY - BOI

LCYBOI

London City

Mon 8/12

07:45-00:10

2 stops23h 25m

Boise Air Term. Gowen Fld

Tue 16/12

13:56-17:20

2 stops20h 24m

£712

Flights are sorted by cheapest return flights first.

Deals found on 3/9

Showing 1-10 of 37 results
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Best time to book a flight from London to Boise

Have a flexible travel schedule? Discover the best time to fly to Boise from London with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to Boise

How far ahead should I book a flight from London to Boise?

Use this chart to determine the optimal time to book a return flight from London to Boise. Price data was last updated on 29 August 2025.

To ensure you get the cheapest price possible for a flight from London to Boise, you should look to book at least 20 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London to Boise?

Currently, October is the cheapest month in which you can book a flight from London to Boise (average of £754). Flying from London to Boise in August is currently the most expensive (average of £1,152). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LON to BOI?

Find hourly flight availability from London to Boise. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 September 2025.

It’s typically best to fly out from London to Boise at midday. Doing so could potentially save you 24% on the flight price compared to flying in the evening, which is usually more expensive.

How much does it cost for a return flight from London to Boise?

What’s the top stopover airport for flights from London to Boise?

Share of one-stop return flights from London to Boise chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Denver (DEN) – chosen by Cheapflights users on 50% of one-stop itineraries from London to Boise on Cheapflights.

What’s the cheapest stopover airport for flights from London to Boise?

Average return fare for one-stop flights from London to Boise, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Salt Lake City (SLC) is the most affordable one-stop option, with an average return flight price of £596.

What’s the fastest stopover option from London to Boise?

Shortest average travel time for one-stop one-way flights from London to Boise, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Salt Lake City (SLC) have the shortest average one-way travel time for one-stop routes: 12h 57m.

Which airport typically offers the quickest stopover for flights from London to Boise?

Average stopover duration for one-stop one-way flights from London to Boise, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Denver (DEN) offer the fastest connection on this route, with an average stopover time of 1h 26m.

Reviews of airlines servicing Boise

Get insights into the airlines that provide service to Boise. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boise. Reviews last updated 3 September 2025.
See what other customers who have flown with KLM, United Airlines, andVirgin Atlantic from London to Boise have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

7.8

Entertainment

7.1

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Boarding

7.8

Entertainment

7.1

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Boarding

7.8

Entertainment

7.1

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Boarding

7.8

Entertainment

7.1

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Boarding

7.8

Entertainment

7.1

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Boarding

7.8

Entertainment

7.1

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from London to Boise. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Boise from London?

    Located just 3.3 mi from the city center, Boise Air Term. Gowen Fld is the airport most travelers will use when flying to Boise from London. Booking flights from London to Air Term. Gowen Fld (BOI) should be relatively easy as there are 0 daily inbound flights from London from 6 different airlines.

  • How long is the flight from London to Boise?

    Departing from London to Boise will take you 23h 25m. London and Boise are separated by a distance of 4843 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from London to Boise round-trip?

    According to our current data, KLM (£530), Finnair (£537), and United Airlines (£540) offers the cheapest pricing from London to Boise. KLM is priced at 24% lower than the current average price of a flight leaving 3 months from now.

  • What are the most popular routes from London to Boise?

  • Can I find deals for flights from London to Boise that include hotel bookings?

    Yes. In addition to deals on London to Boise flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Boise?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Boise.

  • Can I find deals for business class flights from London to Boise?

    Yes. Cheapflights offers flight deals from London to Boise by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London to Boise?

    Currently, October is the cheapest month in which you can book a flight from London to Boise (average of £754). Flying from London to Boise in August is currently the most expensive (average of £1,152). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from London to Boise

Discover the top 6 airlines that operate flights from London to Boise. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 3 September 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£530Average£629FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest£537Average£647FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£540Average£669FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£542Average£602FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£599Average£751FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£702Average£856FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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How does Cheapflights help users find flights from London to Boise?

Deals for London to Boise flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London to Boise?

Cheapflights helps you find that perfect flight to Boise from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from London to Boise with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to Boise flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from London to Boise become cheaper?

Yes, Cheapflights offers price alerts on London to Boise flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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