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Cheap flights from Rapid City to London from $634

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Rapid City to London departing on 2/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Rapid City to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
10:45 am - 9:40 am
RAP
-
LHR
15h 55m1 stop
United Airlines Logo
2:30 pm - 10:29 pm
LHR
-
RAP
38h 59m2 stops
$634United Airlines
Wed, Feb 4 - Sun, Feb 8
United Airlines Logo
10:45 am - 9:40 am
RAP
-
LHR
15h 55m1 stop
United Airlines Logo
11:35 am - 8:32 pm
LHR
-
RAP
15h 57m1 stop
$657United Airlines
Wed, Feb 4 - Sun, Feb 8
United Airlines Logo
12:35 pm - 11:15 am
RAP
-
LHR
15h 40m2 stops
United Airlines Logo
10:25 am - 8:32 pm
LHR
-
RAP
17h 07m2 stops
$747United Airlines
Wed, Feb 4 - Sun, Feb 8

United Airlines flights from Rapid City to London Heathrow Airport

Our best United Airlines deals on Rapid City to London Heathrow Airport flight tickets
United Airlines
Feb 4
RAP10:45 amRapid City
15h 55m
1 stop
LHR9:40 amLondon Heathrow
Feb 8
LHR2:30 pmLondon Heathrow
38h 59m
2 stops
RAP10:29 pmRapid City
$634
Find similar
United Airlines
Feb 4
RAP10:45 amRapid City
15h 55m
1 stop
LHR9:40 amLondon Heathrow
Feb 8
LHR11:35 amLondon Heathrow
15h 57m
1 stop
RAP8:32 pmRapid City
$657
Find similar
United Airlines
Feb 4
RAP12:35 pmRapid City
15h 40m
2 stops
LHR11:15 amLondon Heathrow
Feb 8
LHR10:25 amLondon Heathrow
17h 07m
2 stops
RAP8:32 pmRapid City
$747
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Rapid City to London Heathrow Airport 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, momondo users made 832,500 searches. Data last updated December 23, 2025.
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

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Wed 2/4

10:45 am-9:40 am

1 stop15h 55m

London Heathrow

Sun 2/8

2:30 pm-10:29 pm

2 stops38h 59m

$634

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Wed 2/4

10:45 am-9:40 am

1 stop15h 55m

London Heathrow

Sun 2/8

11:35 am-8:32 pm

1 stop15h 57m

$657

Rapid CityLondon

RAP - LHR

RAPLHR

Rapid City

Wed 2/4

12:35 pm-11:15 am

2 stops15h 40m

London Heathrow

Sun 2/8

10:25 am-8:32 pm

2 stops17h 07m

$747

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to London from

How to get the cheapest flight ticket from Rapid City to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Friday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $833. The most expensive day to fly to London Heathrow Airport is Thursday, with ticket prices averaging around $1,130.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Rapid City to London Heathrow Airport in the morning for as low as $932. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $1,189.

Can stopping save me money on Rapid City to London Heathrow Airport flights?

You could potentially save up to 38% on your flight if you consider stops on a Rapid City to London Heathrow Airport flight.

When to book flights from Rapid City to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Rapid City to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Rapid City to London Heathrow Airport (RAP to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Rapid City to London Heathrow Airport

Fastest flight time

15h 55m

Direct flights

None
The fastest flight from Rapid City to London Heathrow Airport takes 15h 55m
There are no direct flights from Rapid City to London Heathrow Airport. There are no popular flight routes from Rapid City to London Heathrow Airport.
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  • How far is Rapid City to London Heathrow by plane?

    A flight from Rapid City to London Heathrow will travel around 4388.5 mi. A reasonable flight in good conditions will take 15h 55m.

  • When did momondo last update prices for flights from Rapid City Airport to London Heathrow Airport?

    Prices for flights from Rapid City Airport to London Heathrow Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Rapid City Airport to London Heathrow Airport?

  • How old do you have to be to fly from Rapid City Airport to London Heathrow Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Rapid City Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Rapid City to London Heathrow Airport?

Best airlines flying from Rapid City to London Heathrow Airport

Compare and see reviews for airlines that fly from Rapid City to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $748Free CancellationRating
7.4
9,105 reviews
Search United Airlines flights

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Why use momondo?

Why should I use momondo to find a flight deal from Rapid City to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Rapid City to London for you.

Can I find flights from Rapid City to London with flexible booking policies on momondo?

Flights from Rapid City to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Rapid City to London?

momondo provides multiple filters to help you find the best flight to London from Rapid City. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Rapid City to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Rapid City to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

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