$175+ Cheap flights from Seattle (SEA) to Reagan-National (DCA)
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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DCA
Oct 23 — Oct 301
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Reagan-National 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 Seattle/Tacoma Intl to Washington, D.C. Reagan-National are usually found in January or February, booked 81 days in advance, depart on a Wednesday or Friday and return on a Wednesday
Cheap flight deals from Seattle to Reagan-National
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to Reagan-NationalExplore the most affordable flight options available from Seattle to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2026.
Explore the most affordable flight options available from Seattle to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2026.
This deal was found by Cheapflights users on 9/18. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/188:00 am -
Nonstop5h 20m
Sat 11/288:00 am -
Nonstop6h 06m
Deal found 9/18![Alaska Airlines logo]()
$327
This Mytrip deal was found by Cheapflights users on 9/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:09 pm -
2 stops22h 41m
Mon 11/161:00 pm -
2 stops32h 54m
Deal found 9/22![Frontier logo]()
$336
This deal was found by Cheapflights users on 9/18. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/212:00 pm -
Nonstop4h 59m
Sat 11/288:00 am -
Nonstop6h 06m
Deal found 9/18![Alaska Airlines logo]()
$349
This Mytrip deal was found by Cheapflights users on 9/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:09 pm -
2 stops22h 41m
Tue 11/176:00 pm -
2 stops27h 54m
Deal found 9/22![Frontier logo]()
$350
This MakeMyTrip deal was found by Cheapflights users on 9/23. 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 MakeMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:27 pm -
1 stop16h 42m
Sat 11/147:00 am -
1 stop11h 12m
Deal found 9/23![Frontier logo]()
$353
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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 11/44:27 pm -
1 stop16h 42m
Tue 11/106:00 pm -
1 stop24h 12m
Deal found 9/19![Frontier logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 11/38:09 pm -
2 stops22h 41m
Fri 11/137:00 am -
1 stop11h 12m
Deal found 9/23![Frontier logo]()
$355
This Mytrip deal was found by Cheapflights users on 9/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:09 pm -
2 stops17h 38m
Tue 11/176:00 pm -
2 stops27h 54m
Deal found 9/22![Frontier logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 11/38:09 pm -
2 stops22h 41m
Tue 11/106:00 pm -
1 stop24h 12m
Deal found 9/23![Frontier logo]()
$361
This SmartFares deal was found by Cheapflights users on 9/23. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/78:00 am -
Nonstop5h 20m
Sat 11/145:20 pm -
1 stop8h 40m
Deal found 9/23![Alaska Airlines logo]()
$363
This Super.com deal was found by Cheapflights users on 9/19. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/64:27 pm -
1 stop26h 23m
Mon 11/97:00 am -
1 stop11h 12m
Deal found 9/19![Frontier logo]()
$364
Best flights from Seattle to Reagan-NationalDiscover carefully curated flight deals from Seattle to Reagan-National that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
Discover carefully curated flight deals from Seattle to Reagan-National that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/23. 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 11/48:03 am -
1 stop8h 57m
Mon 11/95:11 pm -
Nonstop6h 02m
Deal found 9/23![Alaska Airlines logo]()
$387
This Southwest deal was found by Cheapflights users on 9/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/2212:35 pm -
1 stop7h 25m
Tue 1/266:10 am -
1 stop9h 50m
Deal found 9/18![Southwest logo]()
$412
This Delta deal was found by Cheapflights users on 9/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:20 am -
Nonstop5h 03m
Wed 10/284:45 pm -
Nonstop5h 50m
Deal found 9/21![Delta logo]()
$447
This Alaska Airlines deal was found by Cheapflights users on 9/21. 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.
Thu 11/51:57 pm -
Nonstop5h 02m
Mon 11/95:11 pm -
Nonstop6h 02m
Deal found 9/21![Alaska Airlines logo]()
$397
This Southwest deal was found by Cheapflights users on 9/19. 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 1/295:00 am -
1 stop8h 45m
Mon 2/16:10 am -
1 stop9h 50m
Deal found 9/19![Southwest logo]()
$412
This Delta deal was found by Cheapflights users on 9/19. 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.
Mon 11/237:20 am -
Nonstop4h 53m
Fri 11/274:25 pm -
Nonstop6h 02m
Deal found 9/19![Delta logo]()
$447
This Alaska Airlines deal was found by Cheapflights users on 9/19. 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.
Sun 10/251:49 pm -
Nonstop5h 10m
Tue 11/310:59 am -
1 stop9h 56m
Deal found 9/19![Alaska Airlines logo]()
$407
This Alaska Airlines deal was found by Cheapflights users on 9/19. 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.
Wed 11/48:00 am -
Nonstop5h 20m
Tue 11/105:11 pm -
Nonstop6h 02m
Deal found 9/19![Alaska Airlines logo]()
$408
This Southwest deal was found by Cheapflights users on 9/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/155:30 am -
1 stop6h 45m
Tue 11/176:10 am -
1 stop9h 40m
Deal found 9/18![Southwest logo]()
$452
This Alaska Airlines deal was found by Cheapflights users on 9/23. 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.
Thu 11/58:00 am -
Nonstop5h 20m
Sun 11/88:00 am -
Nonstop5h 55m
Deal found 9/23![Alaska Airlines logo]()
$447
This Alaska Airlines deal was found by Cheapflights users on 9/18. 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.
Thu 12/245:54 pm -
1 stop19h 06m
Tue 1/55:00 pm -
Nonstop6h 04m
Deal found 9/18![Alaska Airlines logo]()
$457
This Alaska Airlines deal was found by Cheapflights users on 9/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:49 pm -
Nonstop5h 10m
Wed 10/285:00 pm -
Nonstop5h 55m
Deal found 9/22![Alaska Airlines logo]()
$477
Last-minute flights from Seattle to Reagan-NationalDiscover last-minute flight deals from Seattle to Reagan-National. Data last updated September 23, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Reagan-National. Data last updated September 23, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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.
Tue 10/204:27 pm -
1 stop16h 37m
Sat 10/247:00 am -
1 stop11h 12m
Deal found 9/19![Frontier logo]()
$354
This Frontier deal was found by Cheapflights users on 9/23. 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 10/224:27 pm -
1 stop16h 37m
Wed 10/287:00 am -
1 stop11h 12m
Deal found 9/23![Frontier logo]()
$378
This CheapOair deal was found by Cheapflights users on 9/20. 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.
Fri 10/234:27 pm -
1 stop16h 37m
Tue 10/276:00 pm -
1 stop24h 12m
Deal found 9/20![Frontier logo]()
$368
This CheapOair deal was found by Cheapflights users on 9/20. 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.
Fri 10/234:27 pm -
1 stop26h 32m
Fri 10/307:00 am -
1 stop11h 12m
Deal found 9/20![Frontier logo]()
$373
This Alaska Airlines deal was found by Cheapflights users on 9/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:49 pm -
Nonstop5h 10m
Sun 11/18:00 am -
Nonstop5h 55m
Deal found 9/22![Alaska Airlines logo]()
$377
This Mytrip deal was found by Cheapflights users on 9/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/268:00 pm -
2 stops17h 47m
Wed 10/287:00 am -
1 stop11h 12m
Deal found 9/18![Frontier logo]()
$369
This Expedia deal was found by Cheapflights users on 9/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/268:59 pm -
1 stop16h 01m
Sat 10/317:00 am -
1 stop11h 12m
Deal found 9/22![Multiple Airlines logo]()
$383
This Expedia deal was found by Cheapflights users on 9/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:49 am -
1 stop9h 11m
Sat 10/317:00 am -
1 stop11h 12m
Deal found 9/19![Multiple Airlines logo]()
$388
This Cheapflightsfares deal was found by Cheapflights users on 9/23. 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 10/284:27 pm -
1 stop16h 42m
Tue 11/36:00 pm -
1 stop24h 12m
Deal found 9/23![Frontier logo]()
$374
This Alaska Airlines deal was found by Cheapflights users on 9/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:49 am -
1 stop9h 11m
Mon 11/25:11 pm -
Nonstop6h 02m
Deal found 9/22![Alaska Airlines logo]()
$387
This CheapOair deal was found by Cheapflights users on 9/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/314:27 pm -
1 stop17h 42m
Mon 11/167:00 am -
1 stop11h 12m
Deal found 9/21![Frontier logo]()
$366
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 10/314:27 pm -
1 stop17h 42m
Fri 11/137:00 am -
1 stop11h 12m
Deal found 9/23![Frontier logo]()
$386
One-way flights from Seattle to Reagan-NationalSearch for one-way flight options from Seattle to Reagan-National. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
Search for one-way flight options from Seattle to Reagan-National. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/20. 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 11/188:09 pm -
2 stops17h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 11/168:09 pm -
2 stops17h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$177
This Super.com deal was found by Cheapflights users on 9/22. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:27 pm -
1 stop16h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Frontier logo]()
$180
This Super.com deal was found by Cheapflights users on 9/19. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/314:27 pm -
1 stop17h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$182
This Cheapflightsfares deal was found by Cheapflights users on 9/23. 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.
Fri 10/234:27 pm -
1 stop16h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Frontier logo]()
$183
This CheapOair deal was found by Cheapflights users on 9/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/44:27 pm -
1 stop21h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Frontier logo]()
$184
This Trip.com deal was found by Cheapflights users on 9/23. 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 12/94:58 pm -
1 stop20h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Frontier logo]()
$189
Find flight deals from Seattle to Reagan-National
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Reagan-National (DCA). 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 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $327 |
One-way from | $175 (Kiwi.com) |
Popular in | September |
Cheapest in | January |
Average price | $627 |
Good round-trip deal | $410 or less |
Good one-way deal | $288 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Reagan-National 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 23, 2026.
Use the filters below to find and compare flights from Seattle to Washington, D.C. Reagan-National Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Sat 10/17
6:30 am-8:20 pm
1 stop10h 50m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$204
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Mon 11/2
9:08 am-9:00 pm
1 stop8h 52m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$209
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Wed 12/9
9:25 am-10:00 pm
2 stops9h 35m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$209
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Wed 12/30
8:30 pm-10:15 am
2 stops10h 45m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$209
Quickest round-trip
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Sat 11/7
1:57 pm-9:59 pm
Nonstop5h 02m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$219
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Wed 12/30
7:00 am-7:13 pm
1 stop9h 13m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$229
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Fri 1/1
6:30 am-4:15 pm
1 stop6h 45m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$231
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Sat 2/6
7:23 am-3:34 pm
Nonstop5h 11m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$244
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Mon 2/22
7:23 am-3:34 pm
Nonstop5h 11m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$244
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Mon 10/26
7:20 am-3:23 pm
Nonstop5h 03m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$254
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Seattle to Reagan-National
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 Seattle to Reagan-National in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Washington, D.C. Reagan-National Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Washington, D.C. Reagan-National Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Washington, D.C. Reagan-National Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Washington, D.C. Reagan-National Airport 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 Seattle-Washington, D.C. Reagan-National Airport 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 Seattle to Reagan-National
Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Seattle with our price prediction graph.
SEA-DCA
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 Seattle to Washington, D.C. Reagan-National Airport
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Airlines
How far ahead should I book a flight from Seattle to Washington, D.C. Reagan-National Airport?
The price you pay for your flight from Seattle to Washington, D.C. Reagan-National Airport may vary depending on when you book. For the best chance of a lower fare, look to book 80 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Seattle to Washington, D.C. Reagan-National Airport?
Currently, January is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of $318). Flying from Seattle to Washington, D.C. Reagan-National Airport in September is currently the most expensive (average of $627). 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 SEA to DCA?
Find hourly flight availability from Seattle to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 23, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Washington, D.C. Reagan-National Airport as you normally would.
The best insider tips for Seattle to Washington, D.C. Reagan-National Airport 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 Seattle to Washington, D.C. Reagan-National Airport trip
Our travel experts
Reviews of airlines servicing Reagan-National
Get insights into the airlines that provide service to Reagan-National. 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 Reagan-National. Reviews last updated September 23, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andDelta from Seattle to Washington, D.C. Reagan-National Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Related info for your journey
Find useful and relevant information for your journey from Seattle to Reagan-National. 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 Washington, D.C. Reagan-National Airport?
Book flights to Washington, D.C. Reagan-National Airport if you plan to visit one of these locationsAlexandria
Arlington
Owings Mills
Lanham
Tysons
Woodbridge
Reston
Herndon
Hyattsville
Rockville
Fredericksburg
Falls Church
Hanover
Laurel
Springfield
Oxon Hill
Clinton
Hunt Valley
Silver Spring
Largo
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Seattle and Reagan-National flights
Browse other Seattle and Reagan-National flight options. Last updated on September 23, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on September 23, 2026.
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Other flights to Reagan-National
Explore flights to Reagan-National departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 23, 2026.
Top 6 airlines flying from Seattle to Reagan-National
Discover the top 6 airlines that operate flights from Seattle to Reagan-National. 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 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$163 | Average$407 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$181 | Average$300 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$215 | Average$557 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$256 | Average$556 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$264 | Average$470 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$286 | Average$465 | FlexibilityNo cancel fee | On-time69% |