How long is the flight from Idaho to London?

A quick flight from Idaho to London can take about 16h 35m. United Airlines provides one of the quickest options available for as low as £556. The distance from Idaho to London is about 4658 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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 Spokane - London Heathrow or Boise Air Term. Gowen Fld - London Gatwick, 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.

£241+ 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 3 September 2026.

Wed 2/1214:40 -

2 stops20h 05m

Fri 4/1207:40 -

2 stops20h 33m

Deal found 31/8£553

Wed 2/1212:25 -

1 stop16h 35m

Fri 4/1206:35 -

2 stops21h 38m

Deal found 2/9£556

Mon 7/1210:45 -

1 stop15h 55m

Wed 9/1206:35 -

2 stops39h 54m

Deal found 2/9£611

Wed 2/1214:40 -

2 stops21h 05m

Tue 8/1207:40 -

2 stops20h 33m

Deal found 2/9£645

Wed 2/1214:40 -

1 stop12h 00m

Tue 8/1206:35 -

2 stops21h 38m

Deal found 2/9£651

Sun 6/1209:53 -

1 stop19h 27m

Tue 12/114:45 -

1 stop16h 01m

Deal found 30/8£651

Mon 7/1207:00 -

1 stop19h 40m

Wed 9/1207:30 -

2 stops20h 38m

Deal found 1/9£651

Mon 30/1113:12 -

1 stop13h 48m

Mon 7/1220:25 -

2 stops30h 06m

Deal found 29/8£651

Tue 8/1206:35 -

1 stop21h 05m

Tue 12/106:30 -

2 stops19h 03m

Deal found 30/8£651

Mon 7/1207:00 -

1 stop21h 20m

Fri 18/1214:45 -

1 stop16h 21m

Deal found 31/8£652

Wed 2/1213:21 -

1 stop15h 39m

Mon 7/1219:40 -

2 stops23h 59m

Deal found 1/9£653

Wed 2/1207:25 -

2 stops16h 40m

Mon 7/1217:50 -

2 stops29h 45m

Deal found 3/9£654

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 3 September 2026.

Wed 2/1212:25 -

1 stop16h 35m

Fri 4/1206:35 -

2 stops21h 38m

Deal found 29/8£556

Wed 2/1207:25 -

2 stops16h 40m

Mon 7/1217:50 -

2 stops29h 45m

Deal found 3/9£654

Mon 7/1206:15 -

1 stop23h 05m

Wed 9/1214:45 -

1 stop14h 54m

Deal found 29/8£659

Wed 14/1011:18 -

1 stop16h 02m

Wed 21/1008:40 -

2 stops19h 28m

Deal found 1/9£672

Tue 29/913:05 -

2 stops19h 30m

Fri 9/1013:25 -

2 stops39h 45m

Deal found 30/8£705

Wed 2/1212:25 -

1 stop12h 30m

Fri 4/1211:35 -

1 stop16h 38m

Deal found 31/8£710

Tue 6/1014:06 -

2 stops21h 44m

Thu 15/1010:20 -

2 stops20h 39m

Deal found 31/8£770

Wed 18/1106:00 -

2 stops24h 05m

Wed 25/1107:50 -

2 stops21h 01m

Deal found 30/8£881

Sat 3/1016:41 -

2 stops13h 54m

Tue 27/1011:55 -

2 stops16h 30m

Deal found 1/9£896

Mon 7/1214:40 -

1 stop12h 00m

Wed 9/1206:35 -

2 stops33h 53m

Deal found 29/8£611

Wed 14/1015:30 -

1 stop16h 05m

Wed 21/1006:30 -

2 stops16h 20m

Deal found 30/8£665

Sun 18/1013:00 -

1 stop18h 35m

Thu 29/1006:30 -

2 stops21h 40m

Deal found 31/8£673

Wed 2/1214:40 -

2 stops20h 00m

Mon 7/1209:50 -

2 stops18h 23m

Deal found 1/9£711

Wed 14/1006:25 -

2 stops17h 50m

Wed 21/1007:25 -

2 stops19h 04m

Deal found 29/8£676

Wed 18/1107:00 -

2 stops17h 35m

Wed 25/1108:40 -

2 stops19h 29m

Deal found 30/8£676

Wed 7/1014:06 -

2 stops21h 39m

Tue 13/1010:20 -

2 stops16h 46m

Deal found 3/9£779

Mon 19/1014:48 -

2 stops20h 07m

Thu 29/1009:50 -

2 stops17h 07m

Deal found 30/8£745

Tue 2/311:30 -

1 stop12h 25m

Fri 5/310:25 -

2 stops18h 44m

Deal found 1/9£679

Sun 8/1107:40 -

2 stops21h 00m

Fri 20/1106:20 -

2 stops17h 03m

Deal found 1/9£680

Sat 3/1015:28 -

1 stop17h 07m

Mon 12/1009:55 -

1 stop20h 09m

Deal found 3/9£768

Tue 29/914:28 -

1 stop12h 12m

Tue 6/1014:05 -

2 stops34h 11m

Deal found 31/8£679

Sun 6/1213:47 -

1 stop14h 53m

Fri 8/106:30 -

2 stops24h 25m

Deal found 30/8£683

Wed 4/1114:25 -

2 stops20h 15m

Mon 9/1109:50 -

2 stops18h 07m

Deal found 2/9£753

Tue 22/915:34 -

2 stops15h 06m

Tue 29/915:40 -

2 stops16h 19m

Deal found 1/9£920

Thu 19/1106:00 -

2 stops18h 50m

Wed 25/1107:50 -

2 stops21h 01m

Deal found 2/9£923

Mon 19/1007:00 -

2 stops30h 45m

Mon 26/1014:00 -

2 stops38h 34m

Deal found 30/8£866

Tue 29/914:48 -

1 stop11h 52m

Tue 6/1014:05 -

3 stops34h 44m

Deal found 31/8£679

Tue 22/912:14 -

2 stops16h 51m

Sun 27/911:40 -

1 stop19h 28m

Deal found 1/9£824

Sun 6/1213:47 -

1 stop14h 53m

Thu 7/106:30 -

2 stops16h 30m

Deal found 30/8£683

Thu 12/1110:37 -

2 stops24h 03m

Sun 15/1117:15 -

2 stops34h 42m

Deal found 1/9£821

Find flight deals from Idaho to London

Round-trip from	£553
One-way from	£241
Popular in	January
Cheapest in	April
Average price	£709

Lufthansa
2/12-4/12
4 total stops
40h 38m total
Idaho to London

Search Deals

Virgin Atlantic
29/12-31/12
1 total stop
20h 35m total
Idaho to London

Search Deals

Highest demand for flights based on searches. 31% potential increase in price (£294 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 17% potential price decrease (£97 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Tue 29/12

07:00-16:30

1 stop25h 30m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£242

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Mon 28/12

22:43-06:25

1 stop23h 42m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£243

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Wed 30/12

05:00-07:55

2 stops18h 55m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£243

SpokaneLondon

GEG Spokane - LGW London Gatwick

GEGLGW

Spokane

Tue 29/12

06:25-09:00

2 stops18h 35m

London Gatwick

Wed 31/12

00:00-15:00

Nonstop0h 00m

£251

SpokaneLondon

GEG Spokane - LGW London Gatwick

GEGLGW

Spokane

Wed 30/12

05:00-15:45

2 stops26h 45m

London Gatwick

Wed 31/12

00:00-15:00

Nonstop0h 00m

£251

SpokaneLondon

GEG Spokane - LCY London City

GEGLCY

Spokane

Wed 30/12

13:37-16:35

2 stops18h 58m

London City

Wed 31/12

00:00-15:00

Nonstop0h 00m

£256

SpokaneLondon

GEG Spokane - LCY London City

GEGLCY

Spokane

Tue 29/12

06:25-08:50

2 stops18h 25m

London City

Wed 31/12

00:00-15:00

Nonstop0h 00m

£260

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Thu 31/12

07:45-11:15

1 stop19h 30m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£280

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Thu 31/12

05:00-06:50

2 stops17h 50m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£280

SpokaneLondon

GEG Spokane - LGW London Gatwick

GEGLGW

Spokane

Thu 31/12

09:31-15:45

2 stops22h 14m

London Gatwick

Wed 31/12

00:00-15:00

Nonstop0h 00m

£284

Flights are sorted by cheapest return flights first.

Deals found on 1/9

Showing 1-10 of 60 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

GEG-LHR

IDA-LHR

JAC-LHR

GEG-LGW

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

GEG-LHR

IDA-LHR

JAC-LHR

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

Currently, November is the cheapest month in which you can book a flight from Idaho to London (average of £550). Flying from Idaho to London in January is currently the most expensive (average of £1,497). 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?

Airfare is below average for this route at the moment.

Idaho to London flights typically cost between £640 and £911 in March.
The cheapest return price found within the last 5 days was £572 on United Airlines (2 Mar–5 Mar).

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 35m. United Airlines provides one of the quickest options available for as low as £556. The distance from Idaho to London is about 4658 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the most popular routes from Idaho to London?
While some choose either Spokane - London Heathrow or Boise Air Term. Gowen Fld - London Gatwick, 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, November is the cheapest month in which you can book a flight from Idaho to London (average of £550). Flying from Idaho to London in January is currently the most expensive (average of £1,497). 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 £241

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/12. 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 3 September 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 3 September 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 3 September 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 3 September 2026.

Last-minute flights from Idaho to LondonDiscover last-minute flight deals from Idaho to London. Data last updated 3 September 2026 and is based on user searches.

Discover last-minute flight deals from Idaho to London. Data last updated 3 September 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 3 September 2026.

Search for one-way flight options from Idaho to London. Find affordable one-way fares based on user searches. Data last updated 3 September 2026.

Find flight deals from Idaho to London

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Use the filters below to find and compare flights from Idaho to London that are best for you.

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?

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

Airfare is below average for this route at the moment.

Idaho to London flights typically cost between £640 and £911 in March.The cheapest return price found within the last 5 days was £572 on United Airlines (2 Mar–5 Mar).

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

Complete your trip to London 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 London by cabin class

Find flights from Idaho to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to London

Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 3 September 2026.

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

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

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

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

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Travel Smart

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 3 September 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 3 September 2026.

Last-minute flights from Idaho to London
Discover last-minute flight deals from Idaho to London. Data last updated 3 September 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 3 September 2026.

Idaho to London flights typically cost between £640 and £911 in March.
The cheapest return price found within the last 5 days was £572 on United Airlines (2 Mar–5 Mar).