United Airlines flights to Idaho (USID) from £461

Flight Deals

Cheap United Airlines Flight Deals to Idaho

Here are some of the best deals found on KAYAK recently from United Airlines to Idaho that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

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

Round-trip

One-way

Recent return United Airlines flight deals from the United Kingdom to Idaho

Tue, 10 Mar - Tue, 17 Mar

06:35 - 21:03LHR-GEG

21h 28m2 stops

07:02 - 07:25GEG-LHR

17h 23m1 stop

£557United Airlines

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Tue, 10 Mar - Tue, 17 Mar

06:35 - 21:03LHR-GEG

21h 28m2 stops

06:00 - 06:20GEG-LHR

17h 20m2 stops

£559United Airlines

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Mon, 20 Apr - Thu, 30 Apr

08:45 - 11:11LHR-BOI

33h 26m2 stops

08:05 - 07:25BOI-LHR

16h 20m2 stops

£568United Airlines

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Mon, 20 Apr - Mon, 27 Apr

07:25 - 09:54LHR-BOI

33h 29m2 stops

06:15 - 09:40BOI-LHR

20h 25m1 stop

£570United Airlines

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Mon, 20 Apr - Mon, 27 Apr

09:00 - 22:35LHR-BOI

20h 35m2 stops

17:30 - 12:20BOI-LHR

11h 50m1 stop

£571United Airlines

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Tue, 10 Mar - Tue, 17 Mar

07:25 - 17:51LHR-GEG

17h 26m1 stop

12:42 - 12:00GEG-LHR

16h 18m1 stop

£582United Airlines

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Tue, 10 Mar - Tue, 17 Mar

11:35 - 21:18LHR-GEG

16h 43m1 stop

07:02 - 07:25GEG-LHR

17h 23m1 stop

£583United Airlines

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Fri, 20 Feb - Mon, 2 Mar

11:10 - 23:48LHR-BOI

19h 38m2 stops

08:41 - 07:25BOI-LHR

15h 44m1 stop

£588United Airlines

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Fri, 20 Feb - Mon, 2 Mar

11:10 - 23:48LHR-BOI

19h 38m2 stops

17:10 - 20:35BOI-LHR

20h 25m2 stops

£589United Airlines

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Mon, 20 Apr - Mon, 27 Apr

10:35 - 19:35LHR-BOI

16h 00m1 stop

17:30 - 12:20BOI-LHR

11h 50m1 stop

£593United Airlines

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Useful Info

Low season	January
High season	May
Cheapest flight	£461
Average price round-trip	£582

Best time to beat the crowds (22% less expensive on average)

Most popular time to fly and prices are also 6% lower on average.

Flight from London Heathrow Airport to Spokane

(price for this month)

KAYAK's insights & trends for flights to Idaho

Get data-powered insights and trends for flights to Idaho to help you find the cheapest flights, the best time to fly and much more.

Prices

Based on KAYAK data, the cheapest day to fly to Idaho is Wednesday when return tickets can be as cheap as £684. On the other hand, the most expensive day to fly is Sunday, when return prices are £962 on average.

What is the cheapest month to fly from the United Kingdom to Idaho?

The cheapest month for flights from the United Kingdom to Idaho is January, when tickets cost £552 (return) on average. On the other hand, the most expensive months are December and August, when the average cost of round-trip tickets is £1,320 and £894 respectively.

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7.4

Good9,013 verified ratings

7.7Boarding

7.1Entertainment

8.1Crew

6.6Food

7.3Comfort

Pros +

Flight was quick and easy. (in 2447 reviews)

Cons -

Have the middle seats vacant. (in 137 reviews)
The space in economy plus. (in 296 reviews)

Show reviews that mention

10.0 Wonderful

Paul, Nov 2025

United has come a long way, it’s been a fantastic experience traveling with them.

10.0 Wonderful

Anonymous, Nov 2025

The whole experience was excellent

10.0 Wonderful

Anonymous, Nov 2025

The whole experience was excellent

8.0 Very Good

David, Nov 2025

Even though we were delayed, we were able to make our connection

10.0 Wonderful

Claire, Nov 2025

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

10.0 Wonderful

David, Nov 2025

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

10.0 Wonderful

Gheorghe, Nov 2025

Is my favorite Lufthansa?

8.0 Very Good

Semra, Nov 2025

Good trip. Good crew. Thank you!

8.0 Very Good

Semra, Nov 2025

Great crew, excellent landing, good food. Over all great experience. Thank you!

8.0 Very Good

Nathan, Nov 2025

Entertainment and wifi did not work

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Find cheap United Airlines flights to Idaho from £461

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Cheap United Airlines Flight Deals to Idaho

Recent return United Airlines flight deals from the United Kingdom to Idaho

Recent one-way United Airlines flight deals from the United Kingdom to Idaho

Good to know

KAYAK's insights & trends for flights to Idaho

Get data-powered insights and trends for flights to Idaho to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest day to fly to Idaho?

Based on KAYAK data, the cheapest day to fly to Idaho is Wednesday when return tickets can be as cheap as £684. On the other hand, the most expensive day to fly is Sunday, when return prices are £962 on average.

What is the cheapest month to fly from the United Kingdom to Idaho?

The cheapest month for flights from the United Kingdom to Idaho is January, when tickets cost £552 (return) on average. On the other hand, the most expensive months are December and August, when the average cost of round-trip tickets is £1,320 and £894 respectively.

How many airports are there in Idaho?

There are 3 airports in Idaho. The busiest airport is Boise Airport (BOI), with 71% of all flights arriving there.

How long is the flight to Idaho?

An average direct flight from the United Kingdom to Idaho takes 24h 04m, covering a distance of 4629 miles. The shortest route is London Heathrow Airport (LHR) to Spokane (GEG) with an average flight time of 14h 30m.

What are the most popular destinations in Idaho?

Based on KAYAK flight searches, the most popular destination is Boise (59% of total searches to Idaho). The next most popular destinations are Spokane (20%) and Hailey (10%). Searches for flights to Jackson (7%) and to Twin Falls (3%) are also popular.

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Everything you need to know for your flight to Idaho

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