SEA - DCA

C$ 229 Find Cheap Flights from Seattle to Reagan Washington National Airport – Compare and Save

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Everything you should know

Cheapest round-trip
C$ 415
Typical prices: C$ 463-C$ 889
Alaska Airlines
Mon 3/12Thu 6/12
SEA - DCA • Direct
Cheapest one-way flights
C$ 236
Typical prices: C$ 286-C$ 676
Alaska Airlines
Mon 3/12
SEA - DCA • Direct
Direct flights
You can fly direct with Alaska Airlines and Delta. Average duration is 5h
Direct flights
+1
Direct flights
+1
When to book
in advance
Our data shows that travellers who book at least 21 weeks in advance save around 57% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 34% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg C$ 381 (round-trip)
Shortest trip • 7h 26m (one-way)
Insights
Insights
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We hope you enjoy your trip to Washington, D.C. Reagan-National Airport!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Washington, D.C. (SEA-DCA)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Washington, D.C.

Thu, 3 Dec - Sun, 6 Dec
Alaska Airlines Logo
8:00 a.m. - 4:05 p.m.SEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
5h 05mdirect
Alaska Airlines Logo
5:05 p.m. - 8:22 p.m.DCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 17mdirect
C$ 415Alaska Airlines
1 day ago
Thu, 3 Dec - Mon, 7 Dec
Alaska Airlines Logo
2:02 p.m. - 9:59 p.m.SEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 57mdirect
Alaska Airlines Logo
5:05 p.m. - 8:22 p.m.DCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 17mdirect
C$ 415Alaska Airlines
1 day ago
Fri, 11 Dec - Mon, 14 Dec
Delta Logo
7:20 a.m. - 3:06 p.m.SEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 46mdirect
Delta Logo
4:25 p.m. - 7:45 p.m.DCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 20mdirect
C$ 415Delta
1 day ago
Thu, 3 Dec - Wed, 9 Dec
Delta Logo
7:20 a.m. - 3:06 p.m.SEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 46mdirect
Delta Logo
4:25 p.m. - 7:45 p.m.DCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 20mdirect
C$ 415Delta
1 day ago
Fri, 4 Dec - Sun, 6 Dec
Alaska Airlines Logo
2:02 p.m. - 9:59 p.m.SEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 57mdirect
Alaska Airlines Logo
8:00 a.m. - 11:17 a.m.DCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 17mdirect
C$ 415Alaska Airlines
1 day ago
Wed, 2 Dec - Sat, 5 Dec
Alaska Airlines Logo
2:02 p.m. - 9:59 p.m.SEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 57mdirect
Alaska Airlines Logo
5:05 p.m. - 8:22 p.m.DCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 17mdirect
C$ 415Alaska Airlines
1 day ago
Sat, 12 Dec - Tue, 15 Dec
Alaska Airlines Logo
8:00 a.m. - 4:05 p.m.SEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
5h 05mdirect
Alaska Airlines Logo
5:05 p.m. - 8:22 p.m.DCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 17mdirect
C$ 415Alaska Airlines
1 day ago
Thu, 3 Dec - Wed, 9 Dec
Delta Logo
7:20 a.m. - 3:06 p.m.SEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 46mdirect
Delta Logo
4:25 p.m. - 7:45 p.m.DCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 20mdirect
C$ 416Delta
3+ days ago
Thu, 3 Dec - Wed, 9 Dec
Delta Logo
7:20 a.m. - 3:06 p.m.SEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 46mdirect
Delta Logo
4:25 p.m. - 7:45 p.m.DCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 20mdirect
C$ 418Delta
1 day ago
Fri, 4 Dec - Sun, 6 Dec
Delta Logo
11:15 p.m. - 8:49 a.m.SEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
6h 34m1 stop Detroit Metropolitan Wayne County
Delta Logo
4:25 p.m. - 7:45 p.m.DCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 20mdirect
C$ 429Delta
3+ days ago
Booking Insights

Price, demand, and travel trends for Seattle to Washington, D.C. Reagan-National Airport flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Seattle to Washington, D.C. Reagan-National Airport?

Round-trip flights from Seattle to Washington, D.C. Reagan-National Airport typically range from C$ 463 to C$ 889. The lowest price found in the past 5 days was C$ 415, on Alaska Airlines.

What's the cheapest day of the week to fly from Seattle to Washington, D.C. Reagan-National Airport?

Based on deals KAYAK users found in the last 12 months, Friday is the cheapest day of the week to fly from Seattle to Washington, D.C. Reagan-National Airport. It's 6% cheaper than the average day, while Monday is the most expensive, with prices 38% higher.

What is the cheapest month to fly from Seattle to Washington, D.C. Reagan-National Airport?

•February is the cheapest month to fly from Seattle to Washington, D.C. Reagan-National Airport at C$ 409 round-trip.
•June (C$ 862) and November (C$ 783) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 110% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Seattle to Washington, D.C. Reagan-National Airport the cheapest?

Flights from Seattle to Washington, D.C. Reagan-National Airport are cheapest 21 weeks before departure. Booking in this window typically costs about 57% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Key details for Seattle to Washington, D.C. Reagan-National Airport flights

Low season

September

Cheapest flight

C$ 236
Beat the crowds with an average 17% drop in traveller numbers.
The most popular month to fly with an average 10% increase in traveller numbers.
One-way flight from Seattle to Washington, D.C. Reagan-National Airport

When to book flights from Seattle to Washington, D.C.

Are your dates flexible? Find out the best times to travel from Seattle to Washington, D.C. based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Seattle to Washington, D.C. Reagan-National Airport flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • What are the earliest and latest flights from Seattle to Washington, D.C. Reagan-National Airport?

    These are the earliest and latest flight times available from Seattle to Washington, D.C. Reagan-National Airport:

    • Earliest: departs at 7:20 am and lands at 12:20 pm
    • Latest: departs at 2:02 pm and lands at 7:02 pm.

    The flight takes about 5h.

  • Which cabin classes can I book on flights from Seattle to Washington, D.C. Reagan-National Airport?

    Only Economy Class is available on flights from Seattle to Washington, D.C. Reagan-National Airport.

  • How long does a flight from Seattle to Washington, D.C. Reagan-National Airport take?

    A direct flight from Seattle to Washington, D.C. Reagan-National Airport takes 5h, covering 6,012 km.

  • Do I need a passport to fly from Seattle to Washington, D.C. Reagan-National Airport?

    No, a passport is not required for this domestic route, but you will need another form of identification, such as a driver's licence.

  • How much should I expect to pay for a Seattle to Washington, D.C. Reagan-National Airport flight?

    Round-trip flights from Seattle to Washington, D.C. Reagan-National Airport range from C$ 463 to C$ 889, with an average of C$ 623 over the past 12 months. Anything below C$ 463 counts as a good deal.

  • How expensive are last-minute Seattle to Washington, D.C. Reagan-National Airport flights?

    Last-minute fares on this route (booked within two weeks of departure) run 78% above the C$ 623 route average. Book 21 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Seattle to Washington, D.C. Reagan-National Airport?

    On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 381 round-trip via Detroit Metropolitan Wayne County (DTW), compared to C$ 638 for direct.

  • What is the standard checked bag allowance on flights from Seattle to Washington, D.C. Reagan-National Airport?

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 49–C$ 126 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Seattle to Washington, D.C. Reagan-National Airport?

    The Boeing 737-800 Passenger/BBJ2 (winglets) family is used most often on this route, operated mainly by Alaska Airlines. Other aircraft seen on the route include Airbus A321neo variants.

  • How are flight departures from Seattle to Washington, D.C. Reagan-National Airport spread across the day?

    Morning is the busiest departure period on Seattle to Washington, D.C. Reagan-National Airport flights, with 67% leaving in that window. Afternoon departures account for 33%, Evening flights for 0%, and Night flights for 0%.

  • Have flight prices from Seattle to Washington, D.C. Reagan-National Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 415 to C$ 2,486. That means the highest observed fare was about 6x higher than the lowest one.

  • Which airlines offer Wi-Fi on Seattle to Washington, D.C. Reagan-National Airport flights?

    Two airlines offer in-flight Wi-Fi on Seattle to Washington, D.C. Reagan-National Airport flights:

    • Alaska Airlines
    • Delta

    Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.

  • How are flight prices from Seattle to Washington, D.C. Reagan-National Airport looking right now?

    One-way fares from Seattle to Washington, D.C. Reagan-National Airport are currently lower than usual. Average one-way flight prices are about C$ 250, which is 45% below the typical average for this route.

  • What car rental options are available at Washington, D.C. Reagan-National Airport (DCA)?

    Washington, D.C. Reagan-National Airport (DCA) hosts 5 major car rental companies, with daily rates averaging C$ 99 for economy cars. Top options include:

    • Sixt
    • Dollar
    • Thrifty
    • Hertz
    • Alamo

  • Which airports can I use when flying from Seattle to Washington, D.C. Reagan-National Airport?

    Flights from Seattle to Washington, D.C. Reagan-National Airport usually depart from Seattle/Tacoma Intl (SEA) and arrive at Washington, D.C. Reagan-National (DCA).

  • Which airports do connecting flights from Seattle to Washington, D.C. Reagan-National Airport pass through?

    One-stop flights from Seattle to Washington, D.C. Reagan-National Airport most commonly connect through:

    • Chicago O'Hare Intl (ORD) – 35% of one-stop connections
    • Denver Intl (DEN) – 31% of one-stop connections
    • Chicago Midway (MDW) – 20% of one-stop connections
    • Boston Logan Intl (BOS) – 5% of one-stop connections

  • Can I save money by using flexible dates for flights from Seattle to Washington, D.C. Reagan-National Airport?

    Yes. Flexible dates can save you up to 32% on flights from Seattle to Washington, D.C. Reagan-National Airport. Friday is the cheapest departure day at C$ 591 round-trip on average, while Monday is the most expensive at C$ 862, a difference of C$ 271.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • Which airlines fly from Seattle to Washington, D.C. Reagan-National Airport?

    2 airlines operate flights between Seattle and Washington, D.C. Reagan-National Airport. The airlines offering direct flights on this route include:

    • Alaska Airlines
    • Delta

  • How much time can I save by choosing a different layover airport when travelling from Seattle to Washington, D.C. Reagan-National Airport?

    Flying via Minneapolis St Paul (MSP) gives the shortest average 1-stop total travel time at 7h 26m, compared with 7h 40m via Detroit Metropolitan Wayne County (DTW) and 7h 42m via Lambert-St Louis (STL).

  • What is the time difference between Seattle and Washington, D.C. Reagan-National Airport?

    Washington, D.C. Reagan-National Airport is 3 hours ahead of Seattle (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • Which popular places can I visit in Washington, D.C. Reagan-National Airport?

    Some of the most popular sights in Washington, D.C. Reagan-National Airport are Capital One Arena, National Mall, and Kennedy Center. These are among the most viewed places in Washington, D.C. Reagan-National Airport on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Seattle to Washington, D.C. Reagan-National Airport flights?

    Among airlines operating Seattle to Washington, D.C. Reagan-National Airport flights:

    • Alaska Airlines: offers extra legroom; offers free seat selection
    • Delta: offers extra legroom; offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Seattle to Washington, D.C. Reagan-National Airport flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Alaska Airlines: a carry-on bag and a checked bag in Economy Class
    • Delta: a carry-on bag and a checked bag in Economy Class

    Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.

Your guide to booking Seattle to Washington, D.C. Reagan-National Airport flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Friday departure and avoid flying on Monday. On this route, Friday flights average C$ 591, about C$ 271 less than Monday fares (31% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 21 weeks before you fly. On this route, that window historically saves about 57% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Seattle to Washington, D.C. Reagan-National Airport trip for February. Fares historically average C$ 409 round-trip in that month – typically C$ 452 less than the most expensive month, which is June (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Detroit Metropolitan Wayne County Airport (DTW) can be cheaper than flying direct. The cheapest layover option averages C$ 381 round-trip on this route – about C$ 256 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Washington, D.C. Reagan-National Airport.

    • Hyatt House Washington DC The Wharf
    • Intercontinental Hotels Washington D.C. - The Wharf By IHG
    • Canopy by Hilton Washington D.C - The Wharf

Prefer to fly direct from Seattle to Reagan Washington National Airport?

 
Find which airlines fly direct from Seattle/Tacoma Intl Airport to Washington, D.C. Reagan-National Airport, which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to Washington, D.C. Reagan-National

Monday

Alaska Airlines,Delta

Alaska Airlines,Delta

Tuesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Wednesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Thursday

Alaska Airlines,Delta

Alaska Airlines,Delta

Friday

Alaska Airlines,Delta

Alaska Airlines,Delta

Saturday

Alaska Airlines,Delta

Alaska Airlines,Delta

Sunday

Alaska Airlines,Delta

Alaska Airlines,Delta

See more nonstop flights

Direct returns

Washington, D.C. Reagan-National to Seattle/Tacoma Intl

Monday

Alaska Airlines,Delta

Alaska Airlines,Delta

Tuesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Wednesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Thursday

Alaska Airlines,Delta

Alaska Airlines,Delta

Friday

Alaska Airlines,Delta

Alaska Airlines,Delta

Saturday

Alaska Airlines,Delta

Alaska Airlines,Delta

Sunday

Alaska Airlines,Delta

Alaska Airlines,Delta

See more nonstop flights

More options for your flight from Seattle to Washington, D.C.

Complete your trip to Washington, D.C. with a hotel stay or car rental