How does KAYAK find such low prices on flights from London to Idaho?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Idaho. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Idaho?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London to Idaho is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from London to Idaho?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from London to Idaho with an airline and back with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Idaho?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from London to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

Which airlines provide the cheapest flights from London to Idaho?

In the past 3 days, the cheapest round-trip tickets from London to Idaho were found on United Airlines ($705) and American Airlines ($708).

What is the cheapest time of day to fly to Idaho?

The cheapest time of day to fly to Idaho is generally in the afternoon , when round-trip flights cost $1,053 on average. The most expensive time of day to fly to Idaho is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,056.

How long does a flight from London to Idaho take?

The duration of a flight to Idaho depends on your arrival airport. The shortest routes to Idaho from London are to Idaho Falls , which takes 16h 58m , Boise , which takes 17h 26m, and Hailey , which takes 44h 16m.

$521 CHEAP FLIGHTS from London to Idaho

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho

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Flights Deals

One-wayRound-trip

Hailey2 stops$853

Spokane2 stops$705

Hailey2 stops$853

Spokane2 stops$705

Cheap Flights from London to Idaho

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London 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

Last minute

Recent round-trip flight deals from London to Idaho

Fri, Sep 12 - Sat, Sep 27

10:55 am - 1:39 pmLGW-BOI

33h 44m1 stop

8:10 am - 9:30 amBOI-LGW

18h 20m1 stop

$613

Find Deal

Wed, Aug 27 - Sat, Sep 6

10:55 am - 10:54 pmLGW-BOI

18h 59m1 stop

8:10 am - 10:50 amBOI-LGW

19h 40m1 stop

$701

Find Deal

Wed, Sep 24 - Sun, Sep 28

1:45 pm - 11:15 pmLHR-GEG

41h 30m2 stops

12:35 pm - 7:25 amGEG-LHR

34h 50m1 stop

$705United Airlines

Find Deal

Wed, Sep 24 - Sun, Sep 28

1:45 pm - 11:15 pmLHR-GEG

41h 30m2 stops

7:15 am - 2:10 pmGEG-LHR

22h 55m1 stop

$707United Airlines

Find Deal

Wed, Sep 24 - Sun, Sep 28

8:25 am - 7:17 pmLHR-GEG

18h 52m2 stops

1:30 pm - 9:10 amGEG-LHR

35h 40m1 stop

$708American Airlines

Find Deal

Wed, Sep 24 - Sun, Sep 28

2:50 pm - 9:03 pmLHR-GEG

14h 13m1 stop

12:35 pm - 10:25 amGEG-LHR

13h 50m1 stop

$740Lufthansa

Find Deal

Wed, Sep 24 - Sun, Sep 28

1:10 pm - 7:17 pmLHR-GEG

14h 07m1 stop

1:30 pm - 6:50 amGEG-LHR

33h 20m1 stop

$742American Airlines

Find Deal

Wed, Sep 24 - Sun, Sep 28

11:25 am - 9:03 pmLHR-GEG

17h 38m1 stop

1:38 pm - 9:40 amGEG-LHR

12h 02m1 stop

$744Lufthansa

Find Deal

Wed, Sep 24 - Sun, Sep 28

9:20 am - 6:45 pmLCY-GEG

17h 25m2 stops

7:25 pm - 4:40 pmGEG-LCY

37h 15m2 stops

$792Delta

Find Deal

Wed, Sep 24 - Sun, Sep 28

7:45 am - 6:45 pmLCY-GEG

19h 00m2 stops

1:18 pm - 4:40 pmGEG-LCY

19h 22m2 stops

$831Delta

Find Deal

Useful Info

KAYAK's insights & trends for London to Idaho flights

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

Prices

Airlines

What is the cheapest month to fly from London to Idaho?

The cheapest month for flights from London to Idaho is November, when tickets cost $792 (return) on average. On the other hand, the most expensive months are August and July, when the average cost of round-trip tickets is $1,270 and $1,176 respectively.

What’s the cheapest day of the week to fly from London to Idaho?

If your flying dates are flexible, you should consider flying to Idaho on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from London to Idaho. For your return ticket, we recommend flying on a Tuesday and avoiding Fridays for the best deals.

How far in advance should I book a flight from London to Idaho?

To get a below average price on the flight from London to Idaho, you should book around 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Find deals

Low season	January
High season	September
Cheapest flight	$521

Best time to beat the crowds with an average 8% drop in price.

Most popular time to fly and prices are also 10% lower on average.

Flight from London to Boise

How does KAYAK find such low prices on flights from London to Idaho?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Idaho.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Idaho?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London to Idaho is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from London to Idaho?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from London to Idaho with an airline and back with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Idaho?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from London to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.
What is the cheapest time of day to fly to Idaho?
The cheapest time of day to fly to Idaho is generally in the afternoon, when round-trip flights cost $1,053 on average. The most expensive time of day to fly to Idaho is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,056.

Reviews of the top airline flying from London to Idaho

Need help choosing which airline to fly with from London to Idaho? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.

7.4

United AirlinesOverall score based on 8861 reviews

7.7Boarding

7.0Entertainment

7.3Comfort

6.6Food

8.1Crew

Airline reviews

Boarded plane and then delayed 1.5 hours while on the plane

4.0 OkayJake, Jul 2025BIH - SFO

Read more United Airlines reviews

Boarded plane and then delayed 1.5 hours while on the plane

It was all good flight was on time, service was good I enjoyed a few movies and everything was smooth

Survey sent before we actually left. Delay after delay. Now a crew problem.

I love flying with United. Unfortunately, I flew on an older plane with minimal upgraded technology (no Bluetooth functionality or handy charging ports). Otherwise, the flight was great and even arrived early.

They changed my seats after I checked in and I was stressed from the time I saw that information until just before boarding, when the gate attendant fixed it, but it shouldn't have happened. And if it couldn't be prevented, then the people on the phone I spoke with should have done something to help, which they did not, nor did they offer me compensation, just meaningless apologies.

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

My flight was delayed a very short period of time but they did not hold my connecting flight to San Diego, also through United. So they closed the doors before we got off our plane. They would only have to help the door open for another five to ten minutes. So I missed a court deadline for a manditory mediation settlement conference for my client. I had to get an associate to be there in person and be on the phone with him relaying what he needs to do the entire time. The court was very upset with me and so was my client. United cannot be trusted.

Very rough getting into denver. my kid threw up it was so rough.

We were given vouchers we couldn’t use with a 5.5 hour delay

We had a very long diversion and our food voucher didn’t work because the restaurants were closed

Everything you need to know for your flight from London to Idaho

Cabin class

Complete your trip

Flights to other cities

Origins

Popular routes

Return flight deals

Cabin class types available on flights to Idaho

First Class flights from London to Idaho

Business Class flights from London to Idaho

Prem Econ Class flights from London to Idaho

Economy Class flights from London to Idaho

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

$521 Find Cheap Flights from London to Idaho

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho

Best Idaho Flight Deals from London

Cheap Flights from London to Idaho

Recent round-trip flight deals from London to Idaho

Recent one-way flight deals from London to Idaho

Recent last minute flight deals from London to Idaho

KAYAK's insights & trends for London to Idaho flights

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

How much is a round-trip flight from London to Idaho?

What is the cheapest month to fly from London to Idaho?

The cheapest month for flights from London to Idaho is November, when tickets cost $792 (return) on average. On the other hand, the most expensive months are August and July, when the average cost of round-trip tickets is $1,270 and $1,176 respectively.

What’s the cheapest day of the week to fly from London to Idaho?

How far in advance should I book a flight from London to Idaho?

To get a below average price on the flight from London to Idaho, you should book around 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Which airlines provide the cheapest flights from London to Idaho?

In the past 3 days, the cheapest round-trip tickets from London to Idaho were found on United Airlines ($705) and American Airlines ($708).

How long does a flight from London to Idaho take?

The duration of a flight to Idaho depends on your arrival airport. The shortest routes to Idaho from London are to Idaho Falls, which takes 16h 58m, Boise, which takes 17h 26m, and Hailey, which takes 44h 16m.

Good to know

FAQs - booking Idaho flights

How does KAYAK find such low prices on flights from London to Idaho?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Idaho.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Idaho?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London to Idaho is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from London to Idaho?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from London to Idaho with an airline and back with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Idaho?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from London to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

What is the cheapest time of day to fly to Idaho?

The cheapest time of day to fly to Idaho is generally in the afternoon, when round-trip flights cost $1,053 on average. The most expensive time of day to fly to Idaho is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,056.

Reviews of the top airline flying from London to Idaho

Everything you need to know for your flight from London to Idaho

Cabin class types available on flights to Idaho

Complete your trip to Idaho with a hotel stay or car rental

Flights to other popular destinations

Flights from other airports in London to Idaho

Flights from London to popular cities in Idaho

Find deals for your return flight