BOI - LHR

£243 Find Cheap Flights from Boise to London Heathrow Airport – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
£569
Typical prices: £642-£907
United Airlines
Fri 2/3Mon 5/3
BOI - LHR • 2 stops
Cheapest one-way flight
£243
Typical prices: £295-£486
Iberia
Sat 14/4
BOI - LHR • 1 stop
Direct flights
Not available
There are currently no direct flights between Boise and London Heathrow Airport. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
8 weeks
in advance
Our data shows that travellers who book at least 8 weeks in advance save around 32% compared to booking last minute.
Insights
Insights
When to travel
November
Cheapest • 27% price drop
August
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
San Francisco (SFO)
Cheapest • Avg £531 (return)
Portland (PDX)
Shortest trip • 12h 39m (one-way)
Insights
Insights
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you enjoy your trip to London Heathrow Airport!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boise to Heathrow (BOI-LHR)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Boise to Heathrow

Tue, 2 Mar - Fri, 5 Mar
United Airlines Logo
17:30 - 10:50BOI  Boise Air Term. Gowen Fld-LHR London Heathrow
34h 20m2 stops Denver Intl Washington, D.C. Dulles Intl
United Airlines Logo
06:35 - 19:46LHR  London Heathrow-BOI Boise Air Term. Gowen Fld
20h 11m2 stops Munich Franz Josef Strauss San Francisco
£569United Airlines
Tue, 2 Mar - Fri, 5 Mar
United Airlines Logo
17:30 - 08:30BOI  Boise Air Term. Gowen Fld-LHR London Heathrow
32h 00m2 stops Denver Intl Toronto Pearson Intl
United Airlines Logo
06:35 - 19:46LHR  London Heathrow-BOI Boise Air Term. Gowen Fld
20h 11m2 stops Munich Franz Josef Strauss San Francisco
£579United Airlines
Tue, 2 Mar - Fri, 5 Mar
United Airlines Logo
17:30 - 09:40BOI  Boise Air Term. Gowen Fld-LHR London Heathrow
33h 10m1 stop Denver Intl
United Airlines Logo
06:35 - 19:46LHR  London Heathrow-BOI Boise Air Term. Gowen Fld
20h 11m2 stops Munich Franz Josef Strauss San Francisco
£620United Airlines
Tue, 2 Mar - Fri, 5 Mar
United Airlines Logo
17:30 - 09:40BOI  Boise Air Term. Gowen Fld-LHR London Heathrow
33h 10m1 stop Denver Intl
United Airlines Logo
06:35 - 19:46LHR  London Heathrow-BOI Boise Air Term. Gowen Fld
20h 11m2 stops Munich Franz Josef Strauss San Francisco
£624United Airlines
Mon, 29 Mar - Wed, 7 Apr
United Airlines Logo
14:43 - 12:25BOI  Boise Air Term. Gowen Fld-LHR London Heathrow
14h 42m1 stop Denver Intl
United Airlines Logo
07:25 - 19:16LHR  London Heathrow-BOI Boise Air Term. Gowen Fld
18h 51m2 stops Munich Franz Josef Strauss San Francisco
£666United Airlines
Tue, 2 Mar - Fri, 5 Mar
Alaska Airlines Logo
14:00 - 12:20BOI  Boise Air Term. Gowen Fld-LHR London Heathrow
15h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
14:45 - 23:56LHR  London Heathrow-BOI Boise Air Term. Gowen Fld
16h 11m1 stop Seattle/Tacoma Intl
£669Alaska Airlines
Mon, 29 Mar - Wed, 7 Apr
Iberia Logo
12:21 - 12:10BOI  Boise Air Term. Gowen Fld-LHR London Heathrow
16h 49m1 stop Dallas/Fort Worth
Iberia Logo
08:55 - 22:38LHR  London Heathrow-BOI Boise Air Term. Gowen Fld
20h 43m1 stop Dallas/Fort Worth
£672Iberia
Thu, 18 Feb - Tue, 23 Feb
Iberia Logo
07:00 - 08:15BOI  Boise Air Term. Gowen Fld-LHR London Heathrow
18h 15m1 stop Dallas/Fort Worth
Iberia Logo
06:05 - 22:57LHR  London Heathrow-BOI Boise Air Term. Gowen Fld
23h 52m2 stops Madrid Barajas Dallas/Fort Worth
£690Iberia
Mon, 29 Mar - Wed, 7 Apr
Air Canada Logo
11:45 - 13:20BOI  Boise Air Term. Gowen Fld-LHR London Heathrow
18h 35m2 stops San Francisco Vancouver Intl
Air Canada Logo
10:15 - 21:15LHR  London Heathrow-BOI Boise Air Term. Gowen Fld
18h 00m2 stops Calgary San Francisco
£693Air Canada
Thu, 18 Feb - Tue, 23 Feb
Iberia Logo
07:05 - 08:15BOI  Boise Air Term. Gowen Fld-LHR London Heathrow
18h 10m1 stop Dallas/Fort Worth
Iberia Logo
07:30 - 22:59LHR  London Heathrow-BOI Boise Air Term. Gowen Fld
22h 29m2 stops Madrid Barajas Dallas/Fort Worth
£697Iberia
Booking Insights

Price, demand, and travel trends for Boise to London Heathrow Airport flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

How much is a return flight from Boise to London Heathrow Airport?

Return flights from Boise to London Heathrow Airport typically range from £642 to £907. The lowest price found in the past 5 days was £569 on United Airlines.

What's the cheapest day of the week to fly from Boise to London Heathrow Airport?

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from Boise to London Heathrow Airport. It's 7% cheaper than the average day, while Saturday is the most expensive, with prices 28% higher.

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

•November is the cheapest month to fly from Boise to London Heathrow Airport at £525 return.
•June (£1,068) and July (£879) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 103% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Boise to London Heathrow Airport the cheapest?

Flights from Boise to London Heathrow Airport are cheapest 8 weeks before departure. Booking in this window typically costs about 32% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Boise to London Heathrow Airport flights

Low season

December

Cheapest flight

£243
Beat the crowds with an average 38% drop in traveller numbers.
The most popular month to fly with an average 38% increase in traveller numbers.
One-way flight from Boise to London Heathrow Airport

When to book flights from Boise to Heathrow

Are your dates flexible? Find out the best times to travel from Boise to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your Boise to London Heathrow Airport flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • Which cabin classes can I book on flights from Boise to London Heathrow Airport?

    Only Economy class is available on flights from Boise to London Heathrow Airport.

  • How long is a flight from Boise to London Heathrow Airport?

    A direct flight from Boise to London Heathrow Airport takes 00m, covering 4,829 miles.

  • Do I need a passport to fly from Boise to London Heathrow Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Boise to London Heathrow Airport flight?

    Return flights from Boise to London Heathrow Airport range from £642 to £907, with an average of £723 over the past 12 months. Anything below £642 counts as a good deal.

  • How expensive are last-minute Boise to London Heathrow Airport flights?

    Last-minute fares on this route (booked within two weeks of departure) run 30% above the £723 route average. Book 8 weeks before departure for the lowest fares.

  • How are flight prices from Boise to London Heathrow Airport looking right now?

    One-way fares from Boise to London Heathrow Airport are currently lower than usual. Average one-way flight prices are about £285, which is 29% below the typical average for this route.

  • Which airports can I use when flying from Boise to London Heathrow Airport?

    Flights from Boise to London Heathrow Airport usually depart from Boise Air Term. Gowen Fld (BOI) and arrive at London Heathrow (LHR).

  • Which airports do connecting flights from Boise to London Heathrow Airport pass through?

    One-stop flights from Boise to London Heathrow Airport most commonly connect through:

    • Seattle/Tacoma Intl (SEA) – 58% of one-stop connections
    • Denver Intl (DEN) – 34% of one-stop connections
    • Dallas/Fort Worth (DFW) – 3% of one-stop connections
    • San Francisco (SFO) – 1% of one-stop connections

  • Can I save money by using flexible dates for flights from Boise to London Heathrow Airport?

    Yes. Flexible dates can save you up to 28% on flights from Boise to London Heathrow Airport. Tuesday is the cheapest departure day at £673 return on average, while Saturday is the most expensive at £928, a difference of £254.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different stopover airport from Boise to London Heathrow Airport?

    Flying via Portland (PDX) gives the shortest average 1-stop total travel time of 12h 39m, compared to 12h 49m via Denver Intl (DEN) and 13h 55m via Salt Lake City (SLC).

  • What is the time difference between Boise and London Heathrow Airport?

    London Heathrow Airport is 6 hours ahead of Boise (British Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in London Heathrow Airport?

    Some of the most popular sights in London Heathrow Airport are Hyde Park, Tower Bridge, and Royal Albert Hall. These are among the most viewed places in London Heathrow Airport on KAYAK.

Your guide to booking Boise to London Heathrow Airport flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure and avoid flying on Saturday. On this route, Tuesday flights average £673, about £254 less than Saturday fares (27% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 8 weeks before you fly. On this route, that window historically saves about 32% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Boise to London Heathrow Airport trip for November. Fares historically average £525 return in that month – typically £543 less than the most expensive month, which is June (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to London Heathrow Airport.

    • Hilton London Heathrow Airport

More options for your flight from Boise to Heathrow

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