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$751+ Cheap flights from Idaho Falls (IDA) to the United Kingdom

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — LHR
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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Find flight deals from Idaho Falls to United Kingdom

Cheapest flights from Idaho Falls to United Kingdom
Explore the most affordable flight options available from Idaho Falls to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 3, 2025.

This Delta deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:00 amIDA - LHR
2 stops22h 40mDelta
Thu 12/2511:05 amLHR - IDA
2 stops18h 47mDelta
Deal found 11/3$1,442
This United Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/182:30 pmIDA - LHR
2 stops23h 05mUnited Airlines
Thu 12/256:35 amLHR - IDA
2 stops34h 23mUnited Airlines
Deal found 11/3$1,461
This American Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/181:16 pmIDA - LHR
1 stop13h 44mMultiple Airlines
Thu 12/252:55 pmLHR - IDA
1 stop16h 12mMultiple Airlines
Deal found 11/3$1,647

Cheap flight deals from Idaho Falls to United Kingdom

Keep the following information in mind while searching for Idaho Falls to United Kingdom flight deals. Data was last updated November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$741
(United Airlines)

Popular in

August

Cheapest in

March
Provider with most accurate pricing for Idaho Falls Fanning Field-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-London (LON) flights.
Search Deals
From Idaho Falls Fanning Field to United Kingdom
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($190 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($39 potential savings vs. average RT price).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls to United Kingdom that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 3, 2025.
Use the filters below to find and compare flights from Idaho Falls to the United Kingdom that are best for you.

Fly from

Idaho Falls

Fly to

United Kingdom

Route

Depart

Return

Price

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 4/7

5:57 pm-6:55 am

2 stops29h 58m

London Heathrow

Tue 4/14

7:25 am-9:28 am

2 stops33h 03m

$751

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 4/7

1:05 pm-9:50 am

1 stop13h 45m

London Heathrow

Tue 4/14

10:55 am-10:14 pm

1 stop18h 19m

$770

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 4/3

7:00 am-12:20 pm

1 stop22h 20m

London Heathrow

Tue 4/7

4:25 pm-5:22 pm

2 stops31h 57m

$791

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 4/3

6:45 pm-8:00 pm

2 stops18h 15m

London Heathrow

Tue 4/7

11:20 am-10:21 pm

2 stops18h 01m

$912

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 3/27

8:23 am-6:50 am

2 stops16h 27m

London Heathrow

Sun 4/5

4:25 pm-12:22 pm

1 stop26h 57m

$969

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 3/27

2:35 pm-11:20 am

2 stops14h 45m

London Heathrow

Sun 4/5

7:25 am-5:22 pm

2 stops16h 57m

$1,050

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 12/18

6:00 am-11:40 am

2 stops22h 40m

London Heathrow

Thu 12/25

11:05 am-10:52 pm

2 stops18h 47m

$1,442

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Best time to book a flight from Idaho Falls to United Kingdom

Have a flexible travel schedule? Discover the best time to fly to United Kingdom from Idaho Falls with our price prediction graph.
Estimated round-trip 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 Falls to the United Kingdom

What is the cheapest month to book a flight from Idaho Falls to United Kingdom?

Currently, March is the cheapest month in which you can book a flight from Idaho Falls to United Kingdom (average of $693). Flying from Idaho Falls to United Kingdom in June is currently the most expensive (average of $1,127). 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.

What is the cheapest time of day to fly from IDA to GB?

Find hourly flight availability from Idaho Falls to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 3, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 15% on flights from Idaho Falls to United Kingdom by exploring options for tickets in the morning.

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to United Kingdom. Reviews last updated November 3, 2025.
Get a feel of what it's like to fly with United Airlines from Idaho Falls to the United Kingdom by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,997 reviews

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Food

6.6

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,997 reviews
United Airlines
7.4
Good
8,997 reviews

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Food

6.6

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

Find useful and relevant information for your journey from Idaho Falls to United Kingdom. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Idaho Falls to United Kingdom?

    Located just 3.8 mi from the city center, Idaho Falls Fanning Field (IDA) is the airport most travelers will use when flying to United Kingdom from Idaho Falls.

  • How long is the flight from Idaho Falls to United Kingdom?

    There are many flights that can get you from Idaho Falls to United Kingdom in 13h 45m. Fly via United Airlines or Delta to get the fastest option. There are 4705 mi between Idaho Falls and United Kingdom. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Idaho Falls to United Kingdom that include hotel bookings?

    Yes. In addition to deals on Idaho Falls to United Kingdom flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho Falls to United Kingdom?

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

  • Can I find deals for business class flights from Idaho Falls to United Kingdom?

    Yes. Cheapflights offers flight deals from Idaho Falls to United Kingdom 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 Falls to United Kingdom?

    Currently, March is the cheapest month in which you can book a flight from Idaho Falls to United Kingdom (average of $693). Flying from Idaho Falls to United Kingdom in June is currently the most expensive (average of $1,127). 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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Top airline flying from Idaho Falls to United Kingdom

Discover the top airline that operate flights from Idaho Falls to United Kingdom. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$699Average$1,037FlexibilityNo cancel feeOn-time69%

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