$204+ Cheap flights from Reagan-National (DCA) to Seattle (SEA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SEA
Nov 21 — Nov 281
Round-trip
1 adult, Economy
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Find cheap flights from Reagan-National to Seattle with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to Seattle/Tacoma Intl are usually found in February or January, booked 79 days in advance, depart on a Wednesday or Tuesday and return on a Friday
Cheap flight deals from Reagan-National to Seattle
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Best
Last-minute
One-way
Cheapest flights from Reagan-National to SeattleExplore the most affordable flight options available from Reagan-National to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 22, 2026.
Explore the most affordable flight options available from Reagan-National to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 22, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 10/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:00 am -
1 stop11h 43m
Sat 12/124:58 pm -
1 stop26h 01m
Deal found 10/21![Frontier logo]()
$318
This Southwest deal was found by Cheapflights users on 10/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/33:35 pm -
1 stop11h 00m
Thu 12/106:30 am -
1 stop6h 45m
Deal found 10/21![Southwest logo]()
$342
This Cheapflightsfares deal was found by Cheapflights users on 10/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:00 am -
1 stop11h 40m
Mon 12/74:58 pm -
1 stop20h 57m
Deal found 10/21![Frontier logo]()
$347
This Southwest deal was found by Cheapflights users on 10/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/122:40 pm -
1 stop13h 05m
Wed 11/1811:20 am -
1 stop9h 00m
Deal found 10/20![Southwest logo]()
$348
This Frontier deal was found by Cheapflights users on 10/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:00 pm -
1 stop24h 12m
Wed 11/184:27 pm -
1 stop16h 42m
Deal found 10/21![Frontier logo]()
$350
This Cheapflightsfares deal was found by Cheapflights users on 10/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:00 am -
1 stop11h 12m
Sun 11/224:37 pm -
1 stop17h 22m
Deal found 10/19![Frontier logo]()
$357
Best flights from Reagan-National to SeattleDiscover carefully curated flight deals from Reagan-National to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 22, 2026.
Discover carefully curated flight deals from Reagan-National to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 22, 2026.
This Southwest deal was found by Cheapflights users on 10/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/113:35 pm -
1 stop11h 00m
Fri 11/1312:15 am -
1 stop12h 40m
Deal found 10/19![Southwest logo]()
$348
This Alaska Airlines deal was found by Cheapflights users on 10/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/85:05 pm -
Nonstop6h 17m
Mon 12/142:02 pm -
Nonstop4h 57m
Deal found 10/19![Alaska Airlines logo]()
$397
This Delta deal was found by Cheapflights users on 10/19. 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.
Fri 11/134:25 pm -
Nonstop6h 02m
Thu 11/197:20 am -
Nonstop4h 53m
Deal found 10/19![Delta logo]()
$467
This Southwest deal was found by Cheapflights users on 10/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/81:30 pm -
2 stops12h 00m
Thu 1/146:35 am -
1 stop6h 55m
Deal found 10/19![Southwest logo]()
$395
This Alaska Airlines deal was found by Cheapflights users on 10/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/145:05 pm -
Nonstop6h 17m
Mon 12/288:00 am -
Nonstop5h 06m
Deal found 10/17![Alaska Airlines logo]()
$417
This Southwest deal was found by Cheapflights users on 10/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/44:00 pm -
2 stops9h 50m
Wed 12/95:40 am -
2 stops9h 20m
Deal found 10/17![Southwest logo]()
$427
This Alaska Airlines deal was found by Cheapflights users on 10/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/238:00 am -
Nonstop6h 19m
Sun 12/278:00 am -
Nonstop5h 06m
Deal found 10/20![Alaska Airlines logo]()
$437
This Delta deal was found by Cheapflights users on 10/20. 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.
Wed 11/114:25 pm -
Nonstop6h 02m
Mon 11/167:20 am -
Nonstop4h 53m
Deal found 10/20![Delta logo]()
$517
This Southwest deal was found by Cheapflights users on 10/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/259:00 pm -
2 stops16h 15m
Thu 12/39:10 am -
2 stops11h 40m
Deal found 10/21![Southwest logo]()
$456
This Alaska Airlines deal was found by Cheapflights users on 10/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:00 am -
Nonstop5h 55m
Thu 11/199:08 am -
1 stop8h 52m
Deal found 10/18![Alaska Airlines logo]()
$497
This Southwest deal was found by Cheapflights users on 10/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/116:30 pm -
1 stop9h 05m
Thu 12/176:15 am -
2 stops9h 35m
Deal found 10/19![Southwest logo]()
$492
Last-minute flights from Reagan-National to SeattleDiscover last-minute flight deals from Reagan-National to Seattle. Data last updated October 22, 2026 and is based on user searches.
Discover last-minute flight deals from Reagan-National to Seattle. Data last updated October 22, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Sat 11/77:00 am -
1 stop11h 12m
Sat 11/144:27 pm -
1 stop16h 42m
Deal found 10/21![Frontier logo]()
$360
This Southwest deal was found by Cheapflights users on 10/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:30 pm -
1 stop9h 15m
Sun 11/1512:15 am -
1 stop7h 00m
Deal found 10/20![Southwest logo]()
$342
This Trip.com deal was found by Cheapflights users on 10/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:00 am -
1 stop11h 12m
Fri 11/134:27 pm -
1 stop16h 42m
Deal found 10/22![Frontier logo]()
$366
This Kiwi.com deal was found by Cheapflights users on 10/20. 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.
Wed 11/117:00 am -
2 stops29h 45m
Sat 11/144:27 pm -
1 stop16h 42m
Deal found 10/20![Frontier logo]()
$367
This Cheapflightsfares deal was found by Cheapflights users on 10/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/121:00 pm -
1 stop29h 12m
Wed 11/184:27 pm -
1 stop16h 42m
Deal found 10/20![Frontier logo]()
$347
This Southwest deal was found by Cheapflights users on 10/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/122:40 pm -
1 stop13h 05m
Wed 11/1811:20 am -
1 stop9h 00m
Deal found 10/20![Southwest logo]()
$348
This CheapOair deal was found by Cheapflights users on 10/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:00 pm -
1 stop24h 12m
Sat 11/214:37 pm -
1 stop26h 18m
Deal found 10/20![Frontier logo]()
$330
This CheapOair deal was found by Cheapflights users on 10/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:00 pm -
1 stop24h 12m
Sun 11/224:37 pm -
1 stop17h 22m
Deal found 10/20![Frontier logo]()
$359
This Cheapflightsfares deal was found by Cheapflights users on 10/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:00 am -
1 stop11h 12m
Sun 11/224:37 pm -
1 stop17h 22m
Deal found 10/19![Frontier logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 11/237:00 am -
1 stop11h 22m
Wed 12/24:58 pm -
1 stop16h 50m
Deal found 10/21![Frontier logo]()
$365
One-way flights from Reagan-National to SeattleSearch for one-way flight options from Reagan-National to Seattle. Find affordable one-way fares based on user searches. Data last updated October 22, 2026.
Search for one-way flight options from Reagan-National to Seattle. Find affordable one-way fares based on user searches. Data last updated October 22, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 11/231:54 pm -
1 stop28h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Frontier logo]()
$204
This Super.com deal was found by Cheapflights users on 10/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:00 am -
1 stop11h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Frontier logo]()
$206
This Trip.com deal was found by Cheapflights users on 10/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:00 pm -
1 stop24h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Frontier logo]()
$208
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/55:05 pm -
Nonstop6h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Alaska Airlines logo]()
$209
This Frontier deal was found by Cheapflights users on 10/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:00 am -
1 stop11h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Frontier logo]()
$210
This Super.com deal was found by Cheapflights users on 10/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/311:20 pm -
1 stop26h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Frontier logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Sun 11/157:00 am -
2 stops38h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Frontier logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 10/18. 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 11/167:00 am -
2 stops38h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Frontier logo]()
$215
This American Airlines deal was found by Cheapflights users on 10/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/245:00 am -
1 stop8h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![American Airlines logo]()
$219
Find flight deals from Reagan-National to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Seattle (SEA). 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 October 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $318 (Cheapflightsfares) |
One-way from | $204 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $586 |
Good round-trip deal | $377 or less |
Good one-way deal | $256 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Reagan-National to Seattle 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 7,457,451 searches. Data last updated October 22, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Sat 12/12
4:25 pm-7:45 pm
Nonstop6h 20m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$209
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Mon 1/4
9:30 am-7:03 pm
1 stop12h 33m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$219
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Mon 12/21
5:05 pm-10:32 pm
1 stop8h 27m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$239
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Mon 11/23
8:00 am-11:06 am
Nonstop6h 06m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$249
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Sat 11/21
3:50 pm-11:05 pm
2 stops10h 15m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$274
Quickest round-trip
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Wed 11/25
4:25 pm-7:27 pm
Nonstop6h 02m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$279
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Sun 1/3
8:00 am-11:19 am
Nonstop6h 19m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$279
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Thu 11/19
6:25 am-7:17 pm
2 stops15h 52m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$309
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Wed 12/23
5:25 pm-1:45 am
2 stops11h 20m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$324
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Thu 12/17
4:25 pm-7:45 pm
Nonstop6h 20m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$329
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Reagan-National to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Reagan-National to Seattle in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Washington, D.C. Reagan-National Airport-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Reagan-National Airport-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National Airport-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Washington, D.C. Reagan-National Airport-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Reagan-National Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Reagan-National to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Reagan-National with our price prediction graph.
DCA-SEA
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 Washington, D.C. Reagan-National Airport to Seattle
Prices
Airlines
More
How far ahead should I book a flight from Washington, D.C. Reagan-National Airport to Seattle?
The best time to book flights from Washington, D.C. Reagan-National Airport to Seattle is 78 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Seattle?
Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of $289). Flying from Washington, D.C. Reagan-National Airport to Seattle in June is currently the most expensive (average of $610). 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 DCA to SEA?
Find hourly flight availability from Reagan-National to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 22, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Reagan-National Airport to Seattle as you normally would.
What’s the top layover airport for flights from Washington, D.C. Reagan-National Airport to Seattle?
Share of 1-stop round-trip flights from Washington, D.C. Reagan-National Airport to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.
Denver (DEN) – chosen by Cheapflights users on 75% of 1-stop itineraries from Washington, D.C. Reagan-National Airport to Seattle on Cheapflights.
What’s the cheapest layover airport for flights from Washington, D.C. Reagan-National Airport to Seattle?
Average round-trip fare for 1-stop flights from Washington, D.C. Reagan-National Airport to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Chicago (ORD) is the most affordable 1-stop option, with an average round-trip price of $376.
What’s the fastest layover option from Washington, D.C. Reagan-National Airport to Seattle?
Shortest average travel time for 1-stop one-way flights from Washington, D.C. Reagan-National Airport to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 8h 06m.
Which airport typically offers the quickest layover for flights from Washington, D.C. Reagan-National Airport to Seattle?
Average layover duration for 1-stop one-way flights from Washington, D.C. Reagan-National Airport to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 02m.
The best insider tips for Washington, D.C. Reagan-National Airport to Seattle flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Reagan-National Airport to Seattle trip
Our travel experts
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated October 22, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Delta, andUnited Airlines from Washington, D.C. Reagan-National Airport to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Related info for your journey
Find useful and relevant information for your journey from Reagan-National to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Seattle?
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Reagan-National and Seattle flights
Browse other Reagan-National and Seattle flight options. Last updated on October 22, 2026.
Other flights from Reagan-National
Browse through other flights departing from Reagan-National. Flights are based on user searches made on Cheapflights and were last updated on October 22, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 22, 2026.
Top 6 airlines flying from Reagan-National to Seattle
Discover the top 6 airlines that operate flights from Reagan-National to Seattle. 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 7,457,451 searches. Data last updated October 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$123 | Average$332 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$177 | Average$432 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$218 | Average$374 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$218 | Average$454 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$238 | Average$477 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$257 | Average$561 | FlexibilityNo cancel fee | On-time75% |