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Cheap flights from Rapid City to London Heathrow Airport from £431

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 18/5. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — LHR
22 Apr — 29 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Rapid City to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Rapid City to Heathrow
Explore the most affordable flight options available from Rapid City to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 March 2026.

Wed 12/808:55
RAP
-
LHR
1 stop17h 45m
United Airlines
Wed 26/814:05
LHR
-
RAP
2 stops33h 00m
United Airlines
Deal found 18/3£624
Mon 9/1113:00
RAP
-
LHR
1 stop15h 15m
United Airlines
Fri 13/1118:00
LHR
-
RAP
2 stops30h 03m
United Airlines
Deal found 17/3£627
Tue 1/916:41
RAP
-
LHR
1 stop12h 39m
United Airlines
Fri 11/908:00
LHR
-
RAP
1 stop17h 24m
United Airlines
Deal found 18/3£639
Sat 22/816:41
RAP
-
LHR
1 stop33h 59m
United Airlines
Sat 29/807:25
LHR
-
RAP
2 stops21h 58m
United Airlines
Deal found 18/3£660

Find flight deals from Rapid City to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Rapid City (RAP) 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 23 March 2026.

Round-trip from

£624

One-way from

£431

Popular in

June

Cheapest in

February

Average price

£714
United Airlines
  • United Airlines
  • 12/8-26/8
  • 3 total stops
  • 50h 45m total
  • Rapid City to London
Search Deals
United Airlines
  • United Airlines
  • 18/5
  • 1 total stop
  • 12h 05m total
  • Rapid City to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£115 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
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Cheapflights Fare Finder

 
Customise your flight search to find flights from Rapid City 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 858,174 searches. Data last updated 23 March 2026.
Use the filters below to find and compare flights from Rapid City to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Wed 12/8

08:55-12:20

1 stop20h 25m

London Heathrow

Wed 26/8

07:30-16:05

2 stops15h 35m

£627
Fastest return journey

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Tue 1/9

10:13-11:50

2 stops18h 37m

London Heathrow

Fri 11/9

14:50-20:32

1 stop12h 42m

£639

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Wed 9/9

05:00-09:40

1 stop21h 40m

London Heathrow

Sat 26/9

14:05-15:52

2 stops32h 47m

£663

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Mon 27/4

10:58-13:05

1 stop19h 07m

London Heathrow

Mon 4/5

06:30-22:20

2 stops22h 50m

£701
Cheapest one-way
Fastest single journey

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Mon 18/5

14:35-09:40

1 stop12h 05m

£431

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Wed 20/5

06:50-07:10

2 stops17h 20m

£475

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Tue 19/5

16:13-12:25

1 stop13h 12m

£475

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Mon 18/5

06:50-10:20

2 stops20h 30m

£475

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Wed 20/5

14:36-13:05

1 stop15h 29m

£512

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Thu 21/5

07:00-10:00

2 stops20h 00m

£522

Flights are sorted by cheapest return flights first.

Deals found on 20/3

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Best time to book a flight from Rapid City to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Rapid City with our price prediction graph.
Estimated return 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 23 March 2026.
Check out reviews from past customers who have flown with United Airlines from Rapid City to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,460 reviews
Check prices

Entertainment

7.1

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,460 reviews
United Airlines
7.4
Good
9,460 reviews
Check prices

Entertainment

7.1

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Rapid City 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 Rapid City to London Heathrow?

    For a flight from Rapid City to London Heathrow, you will be flying from Rapid City. Rapid City (RAP) is just 9.0 mi from the center of the city. Rapid City is the only Rapid City airport and it handles 0 outbound flights to London Heathrow per day. 1 airline has flights to London Heathrow from Rapid City on a regular basis.

  • How long is the flight from Rapid City to London Heathrow Airport?

    Departing from Rapid City to London Heathrow Airport will take you 17h 45m. The distance between Rapid City and London Heathrow Airport is about 4385 mi.

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

    According to our current data, United Airlines (£568), offers the cheapest pricing from Rapid City to London Heathrow Airport.

  • Can I find deals for flights from Rapid City to Heathrow that include hotel bookings?

    Yes. In addition to deals on Rapid City to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Rapid City to Heathrow?

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

  • Can I find deals for business class flights from Rapid City to Heathrow?

    Yes. Cheapflights offers flight deals from Rapid City 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Wembley
Croydon
Northampton
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Eastbourne
Romford
Ipswich
Swindon
Bedford

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Alternative routes for Rapid City to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Sioux Falls to Gatwick flights

Top airline flying from Rapid City to Heathrow

Discover the top airline that operate flights from Rapid City 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 858,174 searches. Data last updated 23 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£568Average£718FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Rapid City to Heathrow?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Heathrow from Rapid City today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Rapid City to Heathrow?

Cheapflights simply makes it quick and affordable to book flights from Rapid City to Heathrow by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Rapid City to Heathrow with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Rapid City to Heathrow, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Rapid City to Heathrow become cheaper?

Yes! Start tracking prices for Rapid City to Heathrow flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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