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Cheap flights from London to Boise from £420

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 19/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
27 Dec — 3 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Boise Air Term. Gowen Fld are usually found in September or February, booked 16 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 27 November 2025.

Round-trip from

£547

One-way from

£420

Popular in

December

Cheapest in

September

Average price

£644
Lufthansa
  • Lufthansa
  • 11/2-15/2
  • 4 total stops
  • 86h 42m total
  • London to Boise
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19/3
  • 19/3
  • 3 total stops
  • 44h 42m total
  • London to Boise
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£46 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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Find flight deals from London to Boise

Enter your travel dates to find the best prices.

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 27 November 2025.

Tue 9/1211:55LHR - BOI
1 stop17h 30mFinnair
Sun 14/1206:44BOI - LHR
1 stop20h 16mFinnair
Deal found 25/11£667
Mon 8/1208:20LHR - BOI
1 stop21h 05mMultiple Airlines
Mon 15/1216:20BOI - LHR
1 stop12h 00mMultiple Airlines
Deal found 26/11£687
Tue 9/1214:45LHR - BOI
1 stop14h 31mVirgin Atlantic
Mon 15/1213:54BOI - LHR
1 stop15h 56mVirgin Atlantic
Deal found 25/11£692
Mon 8/1214:45LHR - BOI
1 stop35h 06mVirgin Atlantic
Tue 16/1214:04BOI - LHR
1 stop33h 21mVirgin Atlantic
Deal found 24/11£697
Tue 9/1210:05LHR - BOI
1 stop32h 29mLufthansa
Sun 14/1219:11BOI - LHR
2 stops29h 44mLufthansa
Deal found 25/11£701
Tue 9/1212:15LHR - BOI
2 stops16h 30mMultiple Airlines
Mon 15/1211:45BOI - LHR
2 stops16h 05mMultiple Airlines
Deal found 24/11£708
Tue 9/1210:05LHR - BOI
1 stop20h 39mLufthansa
Mon 15/1219:11BOI - LHR
2 stops19h 09mLufthansa
Deal found 24/11£709
Tue 9/1206:35LHR - BOI
2 stops18h 32mUnited Airlines
Mon 15/1212:16BOI - LHR
1 stop12h 39mUnited Airlines
Deal found 24/11£715
Mon 8/1207:40LHR - BOI
2 stops33h 19mUnited Airlines
Mon 15/1209:40BOI - LHR
2 stops18h 40mUnited Airlines
Deal found 24/11£720
Tue 9/1212:20LHR - BOI
1 stop16h 56mVirgin Atlantic
Sun 14/1205:35BOI - LHR
1 stop18h 30mVirgin Atlantic
Deal found 24/11£726
Thu 11/1211:55LGW - BOI
2 stops18h 15mMultiple Airlines
Fri 9/109:02BOI - LGW
2 stops18h 53mMultiple Airlines
Deal found 24/11£729
Thu 11/1212:30LGW - BOI
2 stops30h 57mAmerican Airlines
Fri 9/117:54BOI - LGW
2 stops30h 36mAmerican Airlines
Deal found 26/11£815

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 27 November 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

Mon 9/2

07:30-18:07

2 stops17h 37m

Boise Air Term. Gowen Fld

Mon 16/2

14:40-14:45

2 stops17h 05m

£560

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 20/4

06:55-22:35

2 stops22h 40m

Boise Air Term. Gowen Fld

Mon 27/4

06:15-09:40

1 stop20h 25m

£568

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 9/2

10:05-21:23

1 stop18h 18m

Boise Air Term. Gowen Fld

Thu 19/2

12:16-07:55

1 stop12h 39m

£579

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 11/2

13:35-22:57

1 stop16h 22m

Boise Air Term. Gowen Fld

Wed 18/2

08:00-05:55

1 stop14h 55m

£579

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 11/2

10:05-21:23

1 stop18h 18m

Boise Air Term. Gowen Fld

Thu 19/2

10:53-07:25

1 stop13h 32m

£579

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 10/2

13:45-23:48

1 stop17h 03m

Boise Air Term. Gowen Fld

Thu 19/2

13:44-12:00

1 stop15h 16m

£579

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 9/2

10:05-21:23

1 stop18h 18m

Boise Air Term. Gowen Fld

Tue 17/2

10:53-07:25

1 stop13h 32m

£579

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 9/2

10:05-21:23

1 stop18h 18m

Boise Air Term. Gowen Fld

Wed 18/2

10:53-12:00

1 stop18h 07m

£579

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 10/2

10:05-21:25

1 stop18h 20m

Boise Air Term. Gowen Fld

Wed 18/2

10:53-07:25

1 stop13h 32m

£579

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 20/2

06:35-10:12

2 stops34h 37m

Boise Air Term. Gowen Fld

Mon 2/3

06:25-06:40

2 stops17h 15m

£585

Flights are sorted by cheapest return flights first.

Deals found on 25/11

Showing 1-10 of 31 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 21 November 2025.

To ensure you get the cheapest price possible for a flight from London to Boise, you should look to book at least 16 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, May is the cheapest month in which you can book a flight from London to Boise (average of £547). Flying from London to Boise in December is currently the most expensive (average of £691). 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 27 November 2025.

It’s typically best to fly out from London to Boise at midday. Doing so could potentially save you 20% on the flight price compared to flying in the morning, 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 49% 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 £638.

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: 13h 00m.

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 27m.

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 27 November 2025.
See what other customers who have flown with KLM, Virgin Atlantic, andUnited Airlines 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.
KLM
7.7
Good
1,423 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,423 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
675 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
9,046 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,594 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
British Airways
6.7
Okay
7,539 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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 3 different airlines.

  • How long is the flight from London to Boise?

    Departing from London to Boise will take you 17h 37m. London and Boise are separated by a distance of 4829 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, United Airlines (£549), Lufthansa (£552), and Virgin Atlantic (£610) offers the cheapest pricing from London to Boise. United Airlines is priced at 25% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from London to Boise one-way?

    The cheapest airline one-way is Lufthansa, with whom users have recently found tickets for as low as £505. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from London to Boise for a low price.

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

    The most popular flight routes from London to Boise are London Heathrow - Boise Air Term. Gowen Fld, London Gatwick - Boise Air Term. Gowen Fld and London City - Boise Air Term. Gowen Fld.

  • 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, May is the cheapest month in which you can book a flight from London to Boise (average of £547). Flying from London to Boise in December is currently the most expensive (average of £691). 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 4 airlines flying from London to Boise

Discover the top 4 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 27 November 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£526Average£649FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£549Average£665FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£552Average£667FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£610Average£829FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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