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$399+ 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — LHR
feb. 5 — feb. 121
jue. 2/5
jue. 2/12
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 enero 6, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$609
(British Airways)

One-way from

$399
(United Airlines)

Popular in

June

Cheapest in

March

Average price

$823
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. 13% potential increase in price ($148 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 enero 6, 2026.

This British Airways deal was found by Cheapflights users on 1/6. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/27:20 amIDA - LHR
1 stop22h 55mMultiple Airlines
mar. 2/102:20 pmLHR - IDA
1 stop15h 16mMultiple Airlines
Deal found 1/6$609
This Delta deal was found by Cheapflights users on 1/6. 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.
lun. 2/25:25 amIDA - LHR
1 stop21h 35mDelta
mar. 2/1011:05 amLHR - IDA
2 stops18h 52mDelta
Deal found 1/6$613
This Finnair deal was found by Cheapflights users on 1/6. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/77:30 amIDA - LHR
1 stop24h 35mMultiple Airlines
mié. 4/154:10 pmLHR - IDA
1 stop14h 29mMultiple Airlines
Deal found 1/6$625
This KLM deal was found by Cheapflights users on 1/6. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/71:11 pmIDA - LHR
1 stop13h 39mKLM
mié. 4/1511:40 amLHR - IDA
2 stops17h 55mKLM
Deal found 1/6$629
This American Airlines deal was found by Cheapflights users on 1/5. 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.
mar. 4/71:43 pmIDA - LHR
1 stop17h 42mAmerican Airlines
mar. 4/1412:00 pmLHR - IDA
2 stops18h 39mAmerican Airlines
Deal found 1/5$630
This United Airlines deal was found by Cheapflights users on 1/5. 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.
lun. 3/22:40 pmIDA - LHR
1 stop12h 00mUnited Airlines
mié. 3/116:35 amLHR - IDA
2 stops20h 31mUnited Airlines
Deal found 1/5$631
This United Airlines deal was found by Cheapflights users on 1/4. 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.
mar. 2/32:40 pmIDA - LHR
2 stops33h 30mUnited Airlines
mar. 2/106:35 amLHR - IDA
2 stops34h 21mUnited Airlines
Deal found 1/4$634
This United Airlines deal was found by Cheapflights users on 1/4. 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.
lun. 4/62:30 pmIDA - LHR
1 stop14h 50mUnited Airlines
vie. 4/246:55 amLHR - IDA
2 stops33h 58mUnited Airlines
Deal found 1/4$647
This United Airlines deal was found by Cheapflights users on 1/5. 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.
lun. 2/24:19 pmIDA - LHR
2 stops35h 31mUnited Airlines
dom. 2/1512:05 pmLHR - IDA
2 stops28h 43mUnited Airlines
Deal found 1/5$649
This American Airlines deal was found by Cheapflights users on 1/5. 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.
lun. 3/26:03 amIDA - LHR
2 stops18h 17mAmerican Airlines
mié. 3/119:35 amLHR - IDA
2 stops19h 49mAmerican Airlines
Deal found 1/5$663

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 enero 6, 2026.
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

lun. 2/2

7:20 am-1:15 pm

1 stop22h 55m

London Heathrow

mar. 2/10

2:20 pm-10:36 pm

1 stop15h 16m

$609

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

lun. 2/2

5:25 am-10:00 am

1 stop21h 35m

London Heathrow

mar. 2/10

11:05 am-10:57 pm

2 stops18h 52m

$613

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

lun. 3/2

1:10 pm-11:55 am

2 stops15h 45m

London Heathrow

mié. 3/11

11:20 am-10:20 pm

2 stops17h 00m

$613

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

lun. 3/2

2:40 pm-9:40 am

1 stop12h 00m

London Heathrow

mié. 3/11

6:35 am-9:06 pm

2 stops20h 31m

$631

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

mar. 2/3

4:19 pm-9:40 am

1 stop34h 21m

London Heathrow

mar. 2/10

6:35 am-9:56 am

2 stops34h 21m

$631

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

lun. 4/6

2:30 pm-12:20 pm

1 stop14h 50m

London Heathrow

vie. 4/24

6:55 am-9:53 am

2 stops33h 58m

$647

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

lun. 2/2

6:35 pm-10:00 am

1 stop32h 25m

London Heathrow

dom. 2/15

10:45 am-12:22 pm

1 stop32h 37m

$649

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

lun. 2/2

4:19 pm-10:50 am

2 stops35h 31m

London Heathrow

dom. 2/15

12:05 pm-9:48 am

2 stops28h 43m

$649

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

vie. 2/6

10:51 am-10:50 am

2 stops16h 59m

$399

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

vie. 3/6

5:30 pm-6:40 am

2 stops30h 10m

$405

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 18 results
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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 January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 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.

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 enero 6, 2026.
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
9,132 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
9,132 reviews
United Airlines
7.4
Good
9,132 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

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?

    Delta and Virgin Atlantic can get you from Idaho Falls to London Heathrow Airport in just under 15h 45m. Your travel time can differ by up to 5h 50m. Idaho Falls and London Heathrow Airport are separated by a distance of 4705 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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..

  • 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.

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
Ilford
Hounslow
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Croydon
Orpington
Northampton
Watford
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Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

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 enero 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$699Average$1,037FlexibilityNo cancel feeOn-time69%

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