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Heathrow

$308+ Cheap flights from Idaho Falls (IDA) to Heathrow (LHR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — LHR
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Cheap flight deals from Idaho Falls to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$626
(Air France)

One-way from

$308
(Kiwi.com)

Popular in

June

Cheapest in

March
Provider with most accurate pricing for Idaho Falls Fanning Field-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-London Heathrow flights.
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From Idaho Falls Fanning Field to London Heathrow
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One-way flight from Idaho Falls Fanning Field to London Heathrow
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Highest demand for flights based on searches. 20% potential increase in price ($233 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($69 potential savings vs. average RT price).
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Find flight deals from Idaho Falls to Heathrow

Cheapest flights from Idaho Falls to Heathrow
Explore the most affordable flight options available from Idaho Falls to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2025.

This United Airlines deal was found by Cheapflights users on 11/13. 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.
Mon 11/242:45 pmIDA - LHR
1 stop11h 55mUnited Airlines
Tue 12/96:35 amLHR - IDA
2 stops21h 37mUnited Airlines
Deal found 11/13$608
This Delta deal was found by Cheapflights users on 11/13. 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.
Mon 11/241:15 pmIDA - LHR
1 stop13h 45mDelta
Tue 12/910:45 amLHR - IDA
1 stop18h 36mDelta
Deal found 11/13$638
This Delta deal was found by Cheapflights users on 11/13. 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.
Tue 12/27:06 pmIDA - LHR
1 stop31h 54mDelta
Mon 12/155:20 pmLHR - IDA
2 stops36h 01mDelta
Deal found 11/13$739
This United Airlines deal was found by Cheapflights users on 11/12. 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.
Mon 12/224:05 pmIDA - LHR
1 stop34h 35mUnited Airlines
Tue 1/1311:10 amLHR - IDA
2 stops33h 20mUnited Airlines
Deal found 11/12$858
This United Airlines deal was found by Cheapflights users on 11/12. 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.
Mon 12/224:05 pmIDA - LHR
1 stop34h 35mUnited Airlines
Sat 1/1711:35 amLHR - IDA
1 stop32h 55mUnited Airlines
Deal found 11/12$859
This United Airlines deal was found by Cheapflights users on 11/12. 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.
Mon 12/224:05 pmIDA - LHR
1 stop34h 35mUnited Airlines
Fri 1/1612:05 pmLHR - IDA
2 stops28h 51mUnited Airlines
Deal found 11/12$959
This American Airlines deal was found by Cheapflights users on 11/12. 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.
Tue 12/167:00 amIDA - LHR
2 stops17h 50mAmerican Airlines
Sat 1/173:00 pmLHR - IDA
1 stop29h 37mAmerican Airlines
Deal found 11/12$1,026
This Delta deal was found by Cheapflights users on 11/12. 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.
Mon 12/226:57 pmIDA - LHR
1 stop32h 03mDelta
Tue 1/1312:30 pmLHR - IDA
3 stops31h 04mDelta
Deal found 11/12$1,028
This United Airlines deal was found by Cheapflights users on 11/13. 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.
Tue 12/22:45 pmIDA - LHR
1 stop11h 55mUnited Airlines
Mon 12/1511:35 amLHR - IDA
1 stop16h 37mUnited Airlines
Deal found 11/13$1,051
This Delta deal was found by Cheapflights users on 11/12. 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.
Mon 12/226:57 pmIDA - LHR
2 stops32h 33mDelta
Thu 1/1511:45 amLHR - IDA
2 stops37h 06mDelta
Deal found 11/12$1,073
This Delta deal was found by Cheapflights users on 11/12. 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.
Mon 12/226:57 pmIDA - LHR
2 stops32h 33mDelta
Wed 1/146:20 amLHR - IDA
2 stops22h 59mDelta
Deal found 11/12$1,078
This American Airlines deal was found by Cheapflights users on 11/12. 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.
Mon 12/221:16 pmIDA - LHR
2 stops39h 44mAmerican Airlines
Sat 1/1710:15 amLHR - IDA
2 stops34h 22mAmerican Airlines
Deal found 11/12$1,079

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Heathrow 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 13, 2025.
Use the filters below to find and compare flights from Idaho Falls to London Heathrow Airport that are best for you.

Fly from

Idaho Falls

Fly to

Heathrow

Route

Depart

Return

Price

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 11/24

7:00 am-10:15 am

2 stops20h 15m

London Heathrow

Tue 12/9

6:35 am-9:12 pm

2 stops21h 37m

$608

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 1/16

5:25 am-10:00 am

1 stop21h 35m

London Heathrow

Mon 1/19

8:25 pm-5:51 pm

2 stops28h 26m

$626

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 1/15

2:40 pm-7:10 am

2 stops33h 30m

London Heathrow

Mon 1/19

1:50 pm-9:14 pm

2 stops38h 24m

$636

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 1/15

4:19 pm-9:40 am

1 stop34h 21m

London Heathrow

Sun 1/18

1:00 pm-1:30 pm

2 stops55h 30m

$637

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 11/24

1:15 pm-10:00 am

1 stop13h 45m

London Heathrow

Tue 12/9

10:45 am-10:21 pm

1 stop18h 36m

$638

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 1/16

10:51 am-11:05 am

2 stops17h 14m

London Heathrow

Mon 1/19

1:00 pm-1:30 pm

2 stops31h 30m

$641

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 1/16

5:25 am-10:00 am

1 stop21h 35m

London Heathrow

Sun 1/18

10:45 am-10:19 pm

1 stop18h 34m

$653

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 1/9

2:40 pm-9:40 am

1 stop12h 00m

London Heathrow

Fri 1/16

11:35 am-9:16 pm

1 stop16h 41m

$653

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 1/26

9:20 pm-12:50 pm

3 stops56h 30m

$327

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 1/16

9:20 pm-12:50 pm

2 stops56h 30m

$333

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

Showing 1-10 of 19 results
1
2

Compare providers for flights from Idaho Falls to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Idaho Falls to Heathrow in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Idaho Falls-London Heathrow Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Idaho Falls-London Heathrow Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Idaho Falls-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Idaho Falls-London Heathrow Airport flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Idaho Falls-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Idaho Falls to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 London Heathrow Airport

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

Currently, March is the cheapest month in which you can book a flight from Idaho Falls to London Heathrow Airport (average of $693). Flying from Idaho Falls to London Heathrow Airport 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 LHR?

Find hourly flight availability from Idaho Falls to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 13, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 34% on flights from Idaho Falls to London Heathrow Airport by exploring options for tickets in the morning.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated November 13, 2025.
Get a feel of what it's like to fly with United Airlines from Idaho Falls to London Heathrow Airport 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
9,017 reviews

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

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
9,017 reviews
United Airlines
7.4
Good
9,017 reviews

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

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 Heathrow. 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 London Heathrow?

    Idaho Falls Fanning Field (IDA), located 3.8 mi from the city center, is the airport you fly out of when you book flights from Idaho Falls to London Heathrow. 1 airline have flights from Fanning Field to London Heathrow on a regular basis. Booking flights from Idaho Falls Fanning Field to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

  • How long is the flight from Idaho Falls to London Heathrow Airport?

    United Airlines can get you from Idaho Falls to London Heathrow Airport in just under 20h 15m. Your travel time can differ by up to . Idaho Falls and London Heathrow Airport are separated by a distance of 4705 mi.

  • What is the cheapest airline to fly from Idaho Falls to London Heathrow Airport round-trip?

    United Airlines, at $699, was found to be the cheapest airline from Idaho Falls to London Heathrow Airport.. United Airlines is priced at 24% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Idaho Falls to Heathrow 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 London Heathrow Airport?

    Currently, March is the cheapest month in which you can book a flight from Idaho Falls to London Heathrow Airport (average of $693). Flying from Idaho Falls to London Heathrow Airport 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Ilford
Hayes
Southend-on-Sea
Harrow
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Chipping Norton
Wembley
Folkestone

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Idaho Falls to Heathrow

Discover the top airline that operate flights from Idaho Falls to Heathrow. 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 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$699Average$1,037FlexibilityNo cancel feeOn-time69%

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