$173+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SEA
Oct 6 — Oct 131
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 57 days in advance, depart on a Wednesday or Tuesday and return on a Thursday
Cheap flight deals from Reagan-National to Seattle
Cheapest
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 September 6, 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 September 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Fri 11/66:00 pm -
1 stop24h 12m
Wed 11/114:27 pm -
1 stop16h 42m
Deal found 9/4![Frontier logo]()
$284
This American Airlines deal was found by Cheapflights users on 9/5. 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 10/68:20 am -
1 stop9h 32m
Sat 10/1011:59 pm -
1 stop8h 00m
Deal found 9/5![American Airlines logo]()
$287
This CheapOair deal was found by Cheapflights users on 9/2. 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.
Sat 9/266:00 pm -
1 stop24h 08m
Tue 9/294:27 pm -
1 stop16h 44m
Deal found 9/2![Frontier logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Fri 11/66:00 pm -
1 stop24h 12m
Mon 11/98:09 pm -
2 stops17h 38m
Deal found 9/4![Frontier logo]()
$289
This Trip.com deal was found by Cheapflights users on 9/2. 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.
Sat 10/37:00 am -
1 stop11h 08m
Sat 10/104:27 pm -
1 stop16h 37m
Deal found 9/2![Frontier logo]()
$291
This Trip.com deal was found by Cheapflights users on 9/2. 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 10/147:00 am -
1 stop11h 12m
Sat 10/244:27 pm -
1 stop16h 37m
Deal found 9/2![Frontier logo]()
$294
This Trip.com deal was found by Cheapflights users on 9/2. 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.
Thu 11/51:00 pm -
1 stop29h 12m
Mon 11/94:27 pm -
1 stop26h 23m
Deal found 9/2![Frontier logo]()
$296
This Delta deal was found by Cheapflights users on 9/4. 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.
Mon 10/54:45 pm -
Nonstop5h 40m
Wed 10/77:20 am -
Nonstop5h 03m
Deal found 9/4![Delta logo]()
$297
This United Airlines deal was found by Cheapflights users on 9/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/810:22 am -
1 stop8h 10m
Sat 11/1410:56 pm -
1 stop7h 00m
Deal found 9/5![United Airlines logo]()
$299
This Trip.com deal was found by Cheapflights users on 9/3. 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.
Mon 10/56:00 pm -
1 stop24h 08m
Mon 10/194:27 pm -
1 stop26h 32m
Deal found 9/3![Frontier logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 10/211:00 pm -
1 stop29h 12m
Sun 10/254:27 pm -
1 stop16h 37m
Deal found 9/4![Frontier logo]()
$304
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 September 6, 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 September 6, 2026.
This Delta deal was found by Cheapflights users on 9/5. 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.
Mon 11/96:59 pm -
1 stop7h 58m
Thu 11/127:20 am -
Nonstop4h 53m
Deal found 9/5![Delta logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 9/5. 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 10/2810:59 am -
1 stop13h 34m
Wed 11/41:57 pm -
Nonstop5h 02m
Deal found 9/5![Alaska Airlines logo]()
$360
This Southwest deal was found by Cheapflights users on 9/2. 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.
Sat 10/312:35 pm -
2 stops12h 05m
Sat 10/106:30 am -
1 stop10h 50m
Deal found 9/2![Southwest logo]()
$422
This Delta deal was found by Cheapflights users on 9/6. 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.
Sat 10/105:05 pm -
1 stop8h 59m
Sun 10/117:20 am -
Nonstop5h 03m
Deal found 9/6![Delta logo]()
$367
This Alaska Airlines deal was found by Cheapflights users on 9/3. 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 12/58:00 am -
Nonstop5h 55m
Sat 12/128:00 am -
Nonstop5h 08m
Deal found 9/3![Alaska Airlines logo]()
$377
This Delta deal was found by Cheapflights users on 9/5. 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 9/3010:00 pm -
1 stop13h 58m
Tue 10/137:20 am -
Nonstop5h 03m
Deal found 9/5![Delta logo]()
$376
This Delta deal was found by Cheapflights users on 9/5. 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.
Sat 9/264:45 pm -
Nonstop5h 40m
Sat 10/37:20 am -
Nonstop5h 12m
Deal found 9/5![Delta logo]()
$392
This Delta deal was found by Cheapflights users on 9/5. 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.
Tue 9/294:45 pm -
Nonstop5h 40m
Sat 10/107:20 am -
Nonstop5h 03m
Deal found 9/5![Delta logo]()
$392
This Delta deal was found by Cheapflights users on 9/4. 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.
Thu 10/16:10 am -
1 stop7h 16m
Wed 10/76:00 am -
1 stop7h 39m
Deal found 9/4![Delta logo]()
$413
This Delta deal was found by Cheapflights users on 9/3. 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.
Sat 10/34:45 pm -
Nonstop5h 40m
Sun 10/47:20 am -
Nonstop5h 12m
Deal found 9/3![Delta logo]()
$427
This Delta deal was found by Cheapflights users on 9/5. 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 11/184:25 pm -
Nonstop6h 02m
Fri 11/207:20 am -
Nonstop4h 53m
Deal found 9/5![Delta logo]()
$442
Last-minute flights from Reagan-National to SeattleDiscover last-minute flight deals from Reagan-National to Seattle. Data last updated September 6, 2026 and is based on user searches.
Discover last-minute flight deals from Reagan-National to Seattle. Data last updated September 6, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 9/237:00 am -
1 stop11h 08m
Wed 9/304:27 pm -
1 stop16h 44m
Deal found 9/1![Frontier logo]()
$306
This CheapOair deal was found by Cheapflights users on 9/2. 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.
Sat 9/266:00 pm -
1 stop24h 08m
Tue 9/294:27 pm -
1 stop16h 44m
Deal found 9/2![Frontier logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 9/286:00 pm -
1 stop24h 08m
Thu 10/14:27 pm -
1 stop16h 44m
Deal found 9/1![Frontier logo]()
$310
This Trip.com deal was found by Cheapflights users on 9/2. 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.
Sat 10/37:00 am -
1 stop11h 08m
Sat 10/104:27 pm -
1 stop16h 37m
Deal found 9/2![Frontier logo]()
$291
This Delta deal was found by Cheapflights users on 9/4. 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.
Mon 10/54:45 pm -
Nonstop5h 40m
Wed 10/77:20 am -
Nonstop5h 03m
Deal found 9/4![Delta logo]()
$297
This Trip.com deal was found by Cheapflights users on 9/3. 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.
Mon 10/56:00 pm -
1 stop24h 08m
Mon 10/194:27 pm -
1 stop26h 32m
Deal found 9/3![Frontier logo]()
$301
This American Airlines deal was found by Cheapflights users on 9/4. 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 10/68:20 am -
1 stop9h 32m
Sat 10/1011:59 pm -
1 stop8h 00m
Deal found 9/4![American Airlines logo]()
$287
This Trip.com deal was found by Cheapflights users on 9/2. 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 10/147:00 am -
1 stop11h 12m
Sat 10/244:27 pm -
1 stop16h 37m
Deal found 9/2![Frontier logo]()
$294
This CheapOair deal was found by Cheapflights users on 9/2. 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.
Fri 10/166:00 pm -
1 stop24h 12m
Mon 10/194:27 pm -
1 stop21h 29m
Deal found 9/2![Frontier logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 10/211:00 pm -
1 stop29h 12m
Sun 10/254:27 pm -
1 stop16h 37m
Deal found 9/4![Frontier logo]()
$304
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 September 6, 2026.
Search for one-way flight options from Reagan-National to Seattle. Find affordable one-way fares based on user searches. Data last updated September 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Tue 10/66:00 pm -
2 stops29h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Fri 11/67:00 am -
1 stop11h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/56:00 pm -
2 stops27h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Tue 11/36:00 pm -
2 stops27h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$177
This Frontier deal was found by Cheapflights users on 9/6. 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.
Mon 11/27:00 am -
1 stop11h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Thu 10/291:00 pm -
2 stops34h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 9/1. 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.
Tue 9/297:00 am -
2 stops38h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$181
This Super.com deal was found by Cheapflights users on 9/5. 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.
Sun 10/257:00 am -
1 stop11h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 9/1. 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.
Fri 10/27:00 am -
2 stops38h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$183
This Expedia deal was found by Cheapflights users on 9/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/55:00 pm -
Nonstop5h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Alaska Airlines logo]()
$186
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 September 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $284 (Kiwi.com) |
One-way from | $173 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $437 |
Good round-trip deal | $466 or less |
Good one-way deal | $268 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 September 6, 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
Thu 10/1
3:00 pm-12:35 am
1 stop12h 35m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Sat 11/7
6:25 am-7:17 pm
2 stops15h 52m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$219
Quickest round-trip
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Tue 10/6
4:45 pm-7:35 pm
Nonstop5h 50m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$234
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Mon 11/2
5:11 pm-8:13 pm
Nonstop6h 02m
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
Mon 11/23
3:35 pm-11:00 pm
2 stops10h 25m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$254
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Wed 11/25
8:00 am-11:06 am
Nonstop6h 06m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$259
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Fri 11/6
4:45 pm-7:35 pm
Nonstop5h 50m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$264
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Mon 10/19
4:45 pm-7:35 pm
Nonstop5h 50m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$264
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Mon 11/9
6:59 pm-11:57 pm
1 stop7h 58m
Seattle/Tacoma Intl
Thu 11/12
7:20 am-3:13 pm
Nonstop4h 53m
$307
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Wed 10/28
10:59 am-9:33 pm
1 stop13h 34m
Seattle/Tacoma Intl
Wed 11/4
1:57 pm-9:59 pm
Nonstop5h 02m
$360
Showing 1-10 of 19 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 September.
| 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
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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 56 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 $293). 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 September 6, 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 60% 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 $326.
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 10m.
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 13m.
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 September 6, 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
Comfort
7.8
Boarding
8.1
Crew
8.5
Food
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Comfort
7.8
Boarding
8.1
Crew
8.5
Food
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Comfort
7.8
Boarding
8.1
Crew
8.5
Food
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Comfort
7.8
Boarding
8.1
Crew
8.5
Food
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Comfort
7.8
Boarding
8.1
Crew
8.5
Food
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Comfort
7.8
Boarding
8.1
Crew
8.5
Food
7.0
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?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
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Edmonds
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ellensburg
Issaquah
Marysville
Ocean Shores
Lakewood
Fife
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Reagan-National and Seattle flights
Browse other Reagan-National and Seattle flight options. Last updated on September 6, 2026.
Other flights from Reagan-National
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Top 7 airlines flying from Reagan-National to Seattle
Discover the top 7 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 September 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$123 | Average$332 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$173 | Average$414 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$362 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$218 | Average$374 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$218 | Average$440 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$238 | Average$408 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$262 | Average$541 | FlexibilityNo cancel fee | On-time75% |