$399 Cheap Flights from Redmond (RDM) to London (LHR)

View $399 flight on Tue, Feb 10, 2026Opens in a new window

Popular airlines from Redmond Municipal Airport (RDM) to Heathrow Airport (LHR)

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Cheap Flights from Redmond to London (RDM-LHR)

Prices were available within the past 7 days and start at $399 for one-way flights and $592 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Virgin Atlantic
Wed, Dec 31 - Wed, Jan 14
RDM
Redmond
LHR
London
$592 Roundtrip, found 2 days ago
$592
Roundtrip
found 2 days ago
Select Virgin Atlantic flight, departing Wed, Dec 31 from Redmond to London, returning Wed, Jan 14, priced at $592 found 2 days ago
Delta
Tue, Nov 18 - Wed, Dec 24
RDM
Redmond
LHR
London
$596 Roundtrip, found 17 hours ago
$596
Roundtrip
found 17 hours ago
Select Delta flight, departing Tue, Nov 18 from Redmond to London, returning Wed, Dec 24, priced at $596 found 17 hours ago
Delta
Tue, Feb 10 - Tue, Feb 17
RDM
Redmond
LHR
London
$597 Roundtrip, found 15 hours ago
$597
Roundtrip
found 15 hours ago
Select Delta flight, departing Tue, Feb 10 from Redmond to London, returning Tue, Feb 17, priced at $597 found 15 hours ago
Virgin Atlantic
Sun, Nov 16 - Tue, Nov 25
RDM
Redmond
LHR
London
$600 Roundtrip, found 13 hours ago
$600
Roundtrip
found 13 hours ago
Select Virgin Atlantic flight, departing Sun, Nov 16 from Redmond to London, returning Tue, Nov 25, priced at $600 found 13 hours ago
Virgin Atlantic
Wed, Feb 18 - Wed, Mar 4
RDM
Redmond
LHR
London
$601 Roundtrip, found 18 hours ago
$601
Roundtrip
found 18 hours ago
Select Virgin Atlantic flight, departing Wed, Feb 18 from Redmond to London, returning Wed, Mar 4, priced at $601 found 18 hours ago
Delta
Tue, Feb 10 - Tue, Feb 17
RDM
Redmond
LHR
London
$604 Roundtrip, found 15 hours ago
$604
Roundtrip
found 15 hours ago
Select Delta flight, departing Tue, Feb 10 from Redmond to London, returning Tue, Feb 17, priced at $604 found 15 hours ago
Virgin Atlantic
Tue, Feb 10 - Tue, Feb 17
RDM
Redmond
LHR
London
$608 Roundtrip, found 15 hours ago
$608
Roundtrip
found 15 hours ago
Select Virgin Atlantic flight, departing Tue, Feb 10 from Redmond to London, returning Tue, Feb 17, priced at $608 found 15 hours ago
KLM
Tue, Nov 18 - Wed, Dec 24
RDM
Redmond
LHR
London
$624 Roundtrip, found 17 hours ago
$624
Roundtrip
found 17 hours ago
Select KLM flight, departing Tue, Nov 18 from Redmond to London, returning Wed, Dec 24, priced at $624 found 17 hours ago
Scandinavian Airlines
Tue, Sep 1 - Sat, Sep 26
RDM
Redmond
LHR
London
$625 Roundtrip, found 2 days ago
$625
Roundtrip
found 2 days ago
Select Scandinavian Airlines flight, departing Tue, Sep 1 from Redmond to London, returning Sat, Sep 26, priced at $625 found 2 days ago
United
Wed, Feb 18 - Wed, Mar 4
RDM
Redmond
LHR
London
$625 Roundtrip, found 18 hours ago
$625
Roundtrip
found 18 hours ago
Select United flight, departing Wed, Feb 18 from Redmond to London, returning Wed, Mar 4, priced at $625 found 18 hours ago

Find the cheapest month to fly from Redmond (RDM) to London (LHR)

November is typically the cheapest month to fly

From $598 - $1,808 per traveler.

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Heathrow LHR. Cheapest option available. Average driving time to city center is 28 minutes. Flights from $590
LHR
Heathrow
Cheapest
Average driving time to city center28 min
Flights from $590

Frequently asked questions

How much does a flight from Robert's Field Airport (RDM) to Heathrow Airport (LHR) cost?
Grab a cheap one-way flight from $399 or cheap return flight from $592 from Robert's Field Airport (RDM) to Heathrow Airport (LHR) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Robert's Field Airport (RDM) to Heathrow Airport (LHR)?
Planning your getaway for December can help you save, as it's the cheapest month for flights between RDM and LHR. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Robert's Field Airport (RDM) to Heathrow Airport (LHR)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest RDM to LHR flight.
How many flights per day from Robert's Field Airport (RDM) to Heathrow Airport (LHR)?
Nonstop flights from Robert's Field Airport (RDM) to Heathrow Airport (LHR) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from RDM to LHR?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Robert's Field Airport (RDM) to Heathrow Airport (LHR)?
To reach Heathrow Airport (LHR) on schedule, pick a flight that leaves Robert's Field Airport (RDM) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Robert's Field Airport (RDM) to Heathrow Airport (LHR) last-minute?
Booking your plane ticket from RDM to LHR just before your trip is generally more expensive. However, if there's some wiggle room with your departure times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book a RDM to LHR flight and hotel package?
Compared with arranging flights and hotels separately, booking a RDM to LHR flight and hotel package with Expedia could result in significant savings. Better still, having everything in one easy place takes the hassle out of travel planning. Simply secure your flights and choose from our wide range of hotels, then customize your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Robert's Field Airport (RDM) to Heathrow Airport (LHR)?
You can usually cancel or reschedule your RDM to LHR flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Robert's Field
Destination airport
Heathrow
Airlines serving
Air France, Alaska Airlines, American Airlines, British Airways, Delta, Finnair, Iberia, KLM, Scandinavian Airlines, United, Virgin Atlantic
Roundtrip price
$592
Distance
4936 mi

Book with confidence

Redmond to London Flights

The cheapest times to fly from Redmond to London

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Redmond to London are during the month of December. You can find some of the cheapest flights from Redmond to London with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Redmond to London

Sunday is one of the best days to book for cheap flights from Redmond to London: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Redmond to London

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Redmond to London in 2025. You can also book with separate airlines for your outbound and return journeys, from $399 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Redmond to London flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Redmond to London airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Redmond to London Flights

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*Available to One Key members.