Cheap Flights from Rapid City Regional (RAP) to Seattle (SEAA)

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Find the cheapest month to fly from Rapid City Regional to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Rapid City Regional to Seattle flights are currently cheapest in May.

Rapid City to Seattle: Flight information

The things to know before you go.
Cheapest flight found£67
Cheapest month to flyMay

Finding cheap flights from Rapid City Regional to Seattle: Frequently asked questions

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a return flight from Rapid City Regional to Seattle is £259. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Rapid City Regional to Seattle. But we found flights with one or more stops from £259.
As of April 2026, there are no flights flying from Rapid City Regional to Seattle.
The cheapest month to fly from Rapid City Regional to Seattle is usually April.
If you're flying from Rapid City Regional Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 12.1 miles away from the centre of Seattle. We've found flights into this airport from £259.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Rapid City Regional Airport to Seattle on Wednesday, 22 April 2026.
No airlines currently offer direct flights between Rapid City Regional Airport and Seattle. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seattle but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.
In April, the average temperature is usually around 8°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.
Currently, United offers the cheapest flight tickets to Seattle.

Flying from Rapid City Regional Airport (RAP) to Seattle: what you need to know

  • The timezone in Seattle is UTC-7. The city is one hour behind Rapid City, where Rapid City Regional Airport is located.

  • For a relaxed start to your RAP to Seattle flight, allow plenty of time for things like check-in and baggage drop. Turning up two hours ahead of international departures and one hour before domestic flights is the standard rule.

  • Taking off during a peak time like school or public holidays? Expect longer lines at check-in and security. Give yourself extra leeway and arrive up to four hours before international flights and two hours ahead of domestic departures.

  • To reach RAP from central Rapid City, it takes about 20 minutes by car. It's roughly 9 miles from the airport to the city centre.

  • Of the departures from Rapid City Regional Airport, 77.55% arrive as scheduled at their destination.

  • The address for RAP is 4550 Terminal Road, Suite 102.

How to find the cheapest flights from Rapid City Regional Airport (RAP) to Seattle

  • The best price we've seen for a one-way Rapid City Regional Airport to Seattle flight is £67. The cheapest price for a return flight is £259. Remember fares may change due to availability at the time of booking.

  • To find cheap flights from RAP to Seattle, book in advance. Airlines generally offer their most competitively priced fares when flights are first released.

  • If you're willing to be flexible with your travel dates, check out the 'Whole month' tool. It'll give you the cheapest price across each month when looking for your Rapid City Regional Airport to Seattle ticket.

  • Save time searching for cheap flights from RAP to Seattle by setting up a Price Alert. You'll receive an email or notification through the app when fares go down.

  • Choose your preferred arrival and departure times, number of stops and airlines with our filters. Then, sort the results for your flight from Rapid City Regional Airport to Seattle by 'Fastest,' 'Best' or 'Cheapest.'

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport (SEA) to central Seattle takes about 20 minutes by car. The centre is roughly 14 miles away.

  • When travelling on public transport, expect a journey time of about 55 minutes.

  • The last thing you need is a lengthy journey to your hotel if you're arriving on a late flight from Rapid City Regional Airport to Seattle. Stay at one of these accommodation options near SEA instead:

  • Get on the fast track to adventure by picking up a Seattle-Tacoma International Airport rental car. Grab your wheels from Thrifty, Europcar or Budget to explore Seattle and beyond.

  • For the best deal, reserve your ride from Seattle-Tacoma International Airport about one week ahead of your flight from RAP to Seattle.

Lake Union Sea Plane Base Airport (LKE)

  • After your flight from Rapid City Regional Airport to Seattle has touched down, you can reach the city centre in about 10 minutes by car. Central Seattle is roughly 2 miles from Lake Union Sea Plane Base Airport (LKE).

  • You can expect the journey to take about 25 minutes on public transport.

  • Place the 'Do not disturb' sign on your door and unwind at a hotel near LKE. Here are a few options where you can tuck yourself in after your RAP to Seattle flight:

Best time to go to Seattle

  • Visit Seattle during peak season if you like a bustling atmosphere, but remember that hotel prices tend to be higher. Alternatively, book your flights from Rapid City Regional Airport to Seattle in the off-season when prices are cheaper and crowds are smaller.

  • Book a Rapid City Regional Airport to Seattle plane ticket with a departure in August to explore the city during its warmest month. You can expect temperatures to range from 12ºC (54ºF) to 28ºC (82ºF).

  • Search for cheap tickets from RAP to Seattle in February if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -1ºC (30ºF) and 11ºC (52ºF) on average.

More about Seattle

  • When it comes to looking for somewhere to lay your head, you'll find the top stays in Seattle right here. Check out these options as soon as you've locked in your flight from Rapid City Regional Airport to Seattle:

  • All great adventures should include a little sightseeing. LMN Architects, Greyhound: Bus Station and Boeing Radiation Effects Lab are attractions you won't want to skip in Seattle.

Explore more of United States

  • Seattle will leave a lasting impression, but there are so many other parts of United States you'll want to see. Around 150 miles south of Seattle, a trip to Portland will fill your itinerary to the brim. Don't miss top attractions like Pioneer Courthouse Square, Portland Japanese Garden and Pittock Mansion.

  • Around 230 miles east of Seattle, Spokane is another favourite stop in United States. Experience this destination's highlights firsthand at Manito Park, Northwest Museum of Arts & Culture and Spokane Falls.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.