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$447+ 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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — LHR
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$590
(Rumbo)

One-way from

$447
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,022
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. 35% potential increase in price ($561 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($63 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 15, 2025.

This Rumbo deal was found by Cheapflights users on 9/11. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/61:15 pmIDA - LHR
1 stop13h 35mVirgin Atlantic
Wed 10/2211:45 amLHR - IDA
2 stops17h 30mVirgin Atlantic
Deal found 9/11$590
This Delta deal was found by Cheapflights users on 9/12. 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 10/66:00 amIDA - LHR
1 stop20h 50mDelta
Wed 10/226:30 amLHR - IDA
2 stops22h 45mDelta
Deal found 9/12$616
This United Airlines deal was found by Cheapflights users on 9/12. 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 10/610:50 amIDA - LHR
2 stops14h 30mUnited Airlines
Wed 10/2210:50 amLHR - IDA
2 stops18h 59mUnited Airlines
Deal found 9/12$896
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/66:00 amIDA - LHR
2 stops23h 05mMultiple Airlines
Wed 10/2211:00 amLHR - IDA
1 stop14h 13mMultiple Airlines
Deal found 9/12$1,544

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 September 15, 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 10/6

1:15 pm-9:50 am

1 stop13h 35m

London Heathrow

Wed 10/22

11:45 am-10:15 pm

2 stops17h 30m

$590

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 10/6

6:00 am-9:50 am

1 stop20h 50m

London Heathrow

Wed 10/22

6:30 am-10:15 pm

2 stops22h 45m

$616

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 10/6

1:15 pm-9:50 am

1 stop13h 35m

London Heathrow

Wed 10/22

11:00 am-6:13 pm

1 stop14h 13m

$623

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 10/6

10:50 am-8:20 am

2 stops14h 30m

London Heathrow

Wed 10/22

10:50 am-10:49 pm

2 stops18h 59m

$896

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 10/6

6:00 am-12:05 pm

2 stops23h 05m

London Heathrow

Wed 10/22

11:00 am-6:13 pm

1 stop14h 13m

$1,544

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 10/13

7:40 pm-5:45 pm

3 stops39h 05m

$447

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 10/13

1:15 pm-2:15 pm

2 stops18h 00m

$468

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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, November is the cheapest month in which you can book a flight from Idaho Falls to London Heathrow Airport (average of $661). Flying from Idaho Falls to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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 September 15, 2025.

Unlike in the morning, 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 at noon.

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 September 15, 2025.
Get a feel of what it's like to fly with Delta and 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.
Delta
8.0
Very good
7,956 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,956 reviews
Delta
8.0
Very good
7,956 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,931 reviews
Delta
8.0
Very good
7,956 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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. 2 airlines 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?

    Virgin Atlantic, Delta, and KLM can get you from Idaho Falls to London Heathrow Airport in just under 13h 35m. Your travel time can differ by up to 7h 15m. 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 are the cheapest airlines flying from Idaho Falls to London Heathrow Airport round-trip?

    Delta, at $691, was found to be the cheapest airline from Idaho Falls to London Heathrow Airport. An alternate airline flying to your destination would be United Airlines. Delta is priced at 31% 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, November is the cheapest month in which you can book a flight from Idaho Falls to London Heathrow Airport (average of $661). Flying from Idaho Falls to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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
Hayes
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone
Chichester

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Top 2 airlines flying from Idaho Falls to Heathrow

Discover the top 2 airlines 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$691Average$1,200FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$699Average$1,037FlexibilityNo cancel feeOn-time69%

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