How long is the flight from Idaho to London?

A quick flight from Idaho to London can take about 16h 25m. United Airlines provides one of the quickest options available for as low as £667. The distance from Idaho to London is about 4829 mi.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What are the most popular routes from Idaho to London?

While some choose either Boise Air Term. Gowen Fld - London Gatwick or Jackson Hole - London Heathrow, Boise Air Term. Gowen Fld - London Heathrow is the most popular route from Idaho to London.

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to London as you normally would.

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

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

How can I find direct flights from Idaho to London?

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

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

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

£271+ Cheap Flights from Idaho to London

Cheap flight deals from Idaho to London

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2026.

Sun 29/1106:44 -

1 stop18h 31m

Tue 15/1207:30 -

2 stops22h 16m

Deal found 29/10£709

Wed 30/1206:20 -

2 stops18h 35m

Fri 15/106:35 -

2 stops22h 00m

Deal found 26/10£713

Wed 30/1206:30 -

1 stop18h 45m

Fri 15/108:20 -

1 stop18h 46m

Deal found 26/10£715

Wed 9/1211:49 -

1 stop17h 11m

Wed 16/1209:00 -

2 stops21h 34m

Deal found 28/10£717

Thu 26/1113:02 -

1 stop16h 18m

Thu 3/1214:45 -

1 stop34h 38m

Deal found 29/10£733

Tue 17/1107:00 -

1 stop20h 00m

Tue 24/1106:05 -

2 stops24h 44m

Deal found 30/10£747

Tue 17/1110:34 -

2 stops14h 21m

Tue 24/1106:35 -

2 stops21h 40m

Deal found 30/10£751

Thu 26/1114:26 -

1 stop14h 14m

Thu 3/1206:30 -

2 stops16h 34m

Deal found 29/10£755

Fri 11/1207:32 -

2 stops25h 48m

Fri 18/1217:20 -

2 stops29h 59m

Deal found 26/10£1,841

Wed 4/1112:49 -

2 stops19h 11m

Mon 9/1108:05 -

2 stops21h 15m

Deal found 29/10£1,897

Sat 26/1208:06 -

2 stops25h 14m

Fri 1/117:20 -

2 stops29h 59m

Deal found 30/10£2,121

Best flights from Idaho to London
Discover carefully curated flight deals from Idaho to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 October 2026.

Mon 19/411:45 -

1 stop16h 25m

Wed 28/407:25 -

2 stops18h 51m

Deal found 30/10£667

Wed 21/406:00 -

1 stop19h 50m

Mon 26/408:40 -

2 stops18h 37m

Deal found 29/10£720

Thu 4/309:53 -

1 stop19h 27m

Mon 29/317:00 -

1 stop23h 25m

Deal found 27/10£751

Thu 18/207:15 -

2 stops26h 05m

Tue 23/217:20 -

2 stops31h 59m

Deal found 26/10£1,046

Sat 6/320:52 -

1 stop27h 33m

Sun 14/312:05 -

2 stops41h 54m

Deal found 29/10£705

Sun 28/310:38 -

2 stops16h 52m

Sun 11/410:45 -

2 stops20h 19m

Deal found 29/10£750

Sun 18/410:39 -

1 stop16h 01m

Sat 24/410:50 -

2 stops19h 51m

Deal found 28/10£705

Thu 4/310:38 -

1 stop17h 02m

Mon 29/311:45 -

2 stops15h 32m

Deal found 30/10£754

Wed 7/408:40 -

2 stops15h 15m

Sat 17/407:25 -

2 stops18h 51m

Deal found 28/10£709

Fri 12/316:50 -

1 stop16h 40m

Sun 21/310:55 -

1 stop18h 13m

Deal found 27/10£779

Wed 9/1211:49 -

1 stop17h 11m

Wed 16/1209:00 -

2 stops21h 34m

Deal found 28/10£717

Tue 17/1110:34 -

2 stops14h 21m

Tue 24/1106:35 -

2 stops21h 40m

Deal found 30/10£751

Fri 16/408:18 -

2 stops25h 27m

Fri 23/417:50 -

2 stops36h 18m

Deal found 29/10£1,120

Fri 22/106:00 -

1 stop18h 25m

Fri 29/106:35 -

2 stops22h 00m

Deal found 28/10£757

Sat 17/408:18 -

2 stops25h 27m

Sat 24/417:50 -

2 stops36h 05m

Deal found 28/10£1,121

Wed 14/408:18 -

2 stops25h 27m

Fri 11/617:50 -

2 stops36h 18m

Deal found 25/10£1,121

Wed 7/408:18 -

2 stops25h 27m

Sat 17/417:50 -

2 stops36h 05m

Deal found 28/10£1,199

Fri 11/1207:32 -

2 stops25h 48m

Fri 18/1217:20 -

2 stops29h 59m

Deal found 26/10£1,841

Sat 26/1208:06 -

2 stops25h 14m

Fri 1/117:20 -

2 stops29h 59m

Deal found 29/10£2,121

Find flight deals from Idaho to London

Round-trip from	£568
One-way from	£271
Popular in	January
Cheapest in	April
Average price	£819

United Airlines
2/3-5/3
4 total stops
54h 31m total
Idaho to London

Search Deals

26/11-31/12
3 total stops
40h 10m total
Idaho to London

Search Deals

Highest demand for flights based on searches. 29% potential increase in price (£279 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 16% potential price decrease (£97 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Thu 26/11

07:00-12:50

2 stops46h 50m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£286

Fastest return journey

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

£288

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

16:50-16:30

1 stop16h 40m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£295

BoiseLondon

BOI Boise Air Term. Gowen Fld - STN London Stansted

BOISTN

Boise Air Term. Gowen Fld

Thu 26/11

13:40-23:55

3 stops51h 15m

London Stansted

Wed 31/12

00:00-16:00

Nonstop0h 00m

£310

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sun 8/11

14:49-19:30

3 stops45h 41m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£356

BoiseLondon

BOI Boise Air Term. Gowen Fld - STN London Stansted

BOISTN

Boise Air Term. Gowen Fld

Sun 8/11

14:49-17:05

3 stops43h 16m

London Stansted

Wed 31/12

00:00-16:00

Nonstop0h 00m

£358

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

14:00-15:30

3 stops42h 30m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£406

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Mon 19/4

11:45-11:10

1 stop16h 25m

London Heathrow

Wed 28/4

07:25-19:16

2 stops18h 51m

£667

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sat 6/3

20:52-07:25

1 stop27h 33m

London Heathrow

Sun 14/3

12:05-23:59

2 stops41h 54m

£705

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sun 18/4

10:39-09:40

1 stop16h 01m

London Heathrow

Sat 24/4

10:50-23:41

2 stops19h 51m

£705

Flights are sorted by cheapest return flights first.

Deals found on 27/10

Showing 1-10 of 27 resultsSorted by cheapest first

Best time to book a flight from Idaho to London

Have a flexible travel schedule? Discover the best time to fly to London from Idaho with our price prediction graph.

BOI-LHR

BOI-STN

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 Idaho to London

USID-LON

BOI-LHR

BOI-STN

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

Currently, March is the cheapest month in which you can book a flight from Idaho to London (average of £613). Flying from Idaho to London in January is currently the most expensive (average of £1,515). 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.

Related info for your journey

How long is the flight from Idaho to London?
A quick flight from Idaho to London can take about 16h 25m. United Airlines provides one of the quickest options available for as low as £667. The distance from Idaho to London is about 4829 mi.
What are the most popular routes from Idaho to London?
While some choose either Boise Air Term. Gowen Fld - London Gatwick or Jackson Hole - London Heathrow, Boise Air Term. Gowen Fld - London Heathrow is the most popular route from Idaho to London.
Can I find deals for flights from Idaho to London that include hotel bookings?
Yes. In addition to deals on Idaho to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Idaho to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to London.
Can I find deals for business class flights from Idaho to London?
Yes. Cheapflights offers flight deals from Idaho to London 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 Idaho to London?
Currently, March is the cheapest month in which you can book a flight from Idaho to London (average of £613). Flying from Idaho to London in January is currently the most expensive (average of £1,515). 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

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

When you search for this flight from Idaho to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Idaho to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

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

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Of course! You can now track prices for flights from Idaho to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from Idaho to London from £271

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Idaho to London

Cheapest flights from Idaho to LondonExplore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2026.

Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2026.

Best flights from Idaho to LondonDiscover carefully curated flight deals from Idaho to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 October 2026.

Discover carefully curated flight deals from Idaho to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 October 2026.

Last-minute flights from Idaho to LondonDiscover last-minute flight deals from Idaho to London. Data last updated 30 October 2026 and is based on user searches.

Discover last-minute flight deals from Idaho to London. Data last updated 30 October 2026 and is based on user searches.

One-way flights from Idaho to LondonSearch for one-way flight options from Idaho to London. Find affordable one-way fares based on user searches. Data last updated 30 October 2026.

Search for one-way flight options from Idaho to London. Find affordable one-way fares based on user searches. Data last updated 30 October 2026.

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Best time to book a flight from Idaho to London

Have a flexible travel schedule? Discover the best time to fly to London from Idaho with our price prediction graph.

Cheapflights Insights

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

Related info for your journey

How long is the flight from Idaho to London?

What are the most popular routes from Idaho to London?

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

How can I find direct flights from Idaho to London?

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

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

Travelling to a place near London?

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Alternative routes for Idaho to London

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Complete your trip

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Direct flights to England

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Search flights from Idaho to London by cabin class

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Other flights to London

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Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2026.

Best flights from Idaho to London
Discover carefully curated flight deals from Idaho to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 October 2026.

Last-minute flights from Idaho to London
Discover last-minute flight deals from Idaho to London. Data last updated 30 October 2026 and is based on user searches.

One-way flights from Idaho to London
Search for one-way flight options from Idaho to London. Find affordable one-way fares based on user searches. Data last updated 30 October 2026.