Cheap flights from Idaho to London Heathrow Airport from £286
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Idaho to Heathrow
Cheapest flights from Idaho to HeathrowExplore the most affordable flight options available from Idaho to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 October 2026.
Explore the most affordable flight options available from Idaho to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 October 2026.
Best flights from Idaho to HeathrowDiscover carefully curated flight deals from Idaho to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 October 2026.
Discover carefully curated flight deals from Idaho to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 October 2026.
Last-minute flights from Idaho to HeathrowDiscover last-minute flight deals from Idaho to Heathrow. Data last updated 5 October 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Heathrow. Data last updated 5 October 2026 and is based on user searches.
One-way flights from Idaho to HeathrowSearch for one-way flight options from Idaho to Heathrow. Find affordable one-way fares based on user searches. Data last updated 5 October 2026.
Search for one-way flight options from Idaho to Heathrow. Find affordable one-way fares based on user searches. Data last updated 5 October 2026.
Find flight deals from Idaho to Heathrow
Keep the following information in mind while searching for Idaho to Heathrow flight deals. Data was last updated 5 October 2026.
Cheapflights Fare Finder
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
BoiseLondon
BOI Boise Air Term. Gowen Fld - LHR London Heathrow
BOILHR
Boise Air Term. Gowen Fld
Fri 12/3
14:00-12:20
1 stop15h 20m
London Heathrow
Wed 31/12
00:00-16:00
Nonstop0h 00m
BoiseLondon
BOI Boise Air Term. Gowen Fld - LHR London Heathrow
BOILHR
Boise Air Term. Gowen Fld
Fri 12/3
14:00-12:10
1 stop15h 10m
London Heathrow
Wed 31/12
00:00-16:00
Nonstop0h 00m
BoiseLondon
BOI Boise Air Term. Gowen Fld - LHR London Heathrow
BOILHR
Boise Air Term. Gowen Fld
Sun 15/11
05:00-05:55
2 stops17h 55m
London Heathrow
Wed 31/12
00:00-16:00
Nonstop0h 00m
BoiseLondon
BOI Boise Air Term. Gowen Fld - LHR London Heathrow
BOILHR
Boise Air Term. Gowen Fld
Fri 12/3
10:39-06:30
2 stops36h 51m
London Heathrow
Wed 31/12
00:00-16:00
Nonstop0h 00m
BoiseLondon
BOI Boise Air Term. Gowen Fld - LHR London Heathrow
BOILHR
Boise Air Term. Gowen Fld
Tue 2/3
16:05-11:15
1 stop36h 10m
London Heathrow
Fri 5/3
06:35-19:16
2 stops19h 41m
BoiseLondon
BOI Boise Air Term. Gowen Fld - LHR London Heathrow
BOILHR
Boise Air Term. Gowen Fld
Tue 2/3
12:00-12:20
1 stop17h 20m
London Heathrow
Fri 5/3
14:45-00:11
1 stop16h 26m
BoiseLondon
BOI Boise Air Term. Gowen Fld - LHR London Heathrow
BOILHR
Boise Air Term. Gowen Fld
Mon 8/3
12:29-12:00
1 stop16h 31m
London Heathrow
Mon 5/4
07:25-19:16
2 stops18h 51m
BoiseLondon
BOI Boise Air Term. Gowen Fld - LHR London Heathrow
BOILHR
Boise Air Term. Gowen Fld
Wed 4/11
13:06-10:00
1 stop13h 54m
London Heathrow
Tue 10/11
06:30-17:17
2 stops17h 47m
BoiseLondon
BOI Boise Air Term. Gowen Fld - LHR London Heathrow
BOILHR
Boise Air Term. Gowen Fld
Wed 4/11
08:28-07:55
1 stop16h 27m
London Heathrow
Tue 10/11
11:35-22:59
1 stop18h 24m
BoiseLondon
BOI Boise Air Term. Gowen Fld - LHR London Heathrow
BOILHR
Boise Air Term. Gowen Fld
Tue 17/11
12:31-07:55
1 stop12h 24m
London Heathrow
Tue 24/11
13:35-22:51
1 stop16h 16m
Best time to book a flight from Idaho to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from Idaho with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Idaho to London Heathrow Airport
What is the cheapest month to book a flight from Idaho to London Heathrow Airport?
Currently, November is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £482). Flying from Idaho to London Heathrow Airport in January is currently the most expensive (average of £1,526). 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.
How much does it cost for a return flight from Idaho to London Heathrow Airport?
Airfare is below average for this route at the moment.
Idaho to London Heathrow Airport flights typically cost between £644 and £949 in March.The cheapest return price found within the last 5 days was £575 on United Airlines (2 Mar–5 Mar).
Related info for your journey
Find useful and relevant information for your journey from Idaho to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsBrowse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Idaho to Heathrow
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Heathrow by adding a car hire and/or hotel booking to your travel itinerary.
Direct flights to England
Book a non-stop flight to one of these other cities located in England.
Search flights from Idaho to Heathrow by cabin class
Find flights from Idaho to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Heathrow
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 5 October 2026.
Idaho and Heathrow flights
Browse other Idaho and Heathrow flight options. Last updated on 5 October 2026.
Popular flight searches
Check out other popular destinations found by fellow travellers in 2026
Idaho to Heathrow flights
Consider these flights travelling from Idaho to Heathrow.
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 Idaho to Heathrow?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Idaho to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
Why should you use Cheapflights to find cheap flight tickets from Idaho to Heathrow?
Cheapflights helps you find that perfect flight to Heathrow from Idaho 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 Idaho to Heathrow with no change fees?
Need flexible booking options for your flight to Heathrow from Idaho? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from Idaho to Heathrow become cheaper?
Not ready to book yet? You can track prices for flights from Idaho to Heathrow on Cheapflights with our Price Alert feature and get notified when better prices are available.