Find cheap flights from District of Columbia to Seattle/Tacoma Airport

SEA

Find cheap flights from District of Columbia to Seattle/Tacoma Airport

Round-trip
Economy
Washington (WAS)
Seattle/Tacoma Intl
Fri 7/10
Fri 7/17
Any month
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Search hundreds of travel sites at once for deals on flights to Seattle/Tacoma Airport

Good to know

Low season

January Best time to beat the crowds with an average 3% drop in price.

High season

December Most popular time to fly with an average 12% increase in price.

Average price of a round-trip

$351 (avg. price over the last 2 weeks)

Good deal for a round-trip

$228 or less

FAQs for booking District of Columbia to Seattle/Tacoma Airport flights

How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?

Top 5 airlines serving District of Columbia to Seattle/Tacoma Intl

Scores according to KAYAK customer reviews

8.7
Korean Air
Overall score based on 4,925 reviews
8.9
Boarding
8.6
Comfort
9.1
Crew
8.6
Entertainment
8.5
Food
Airline reviews
Read more about Korean Air

Book cheap flights from District of Columbia to Seattle/Tacoma Airport (round-trip)

Airports
Origin
Washington
$257
only
$257
$217
only
$217
Destination
Seattle
$217
only
$217
Fri, Jul 31
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 57m
Wed, Aug 19
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
6h 49m
Trip: 20 days
Based on null reviews
Tue, Aug 4
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
5h 39m
Wed, Aug 19
SEA
Seattle/Tacoma Airport
IAD
Washington Dulles Airport
4h 57m
Trip: 16 days
Based on null reviews
Wed, Jul 8
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 15m
Sun, Jul 19
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
8h 23m
Trip: 12 days
Based on null reviews
Thu, Jul 9
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 57m
Tue, Jul 14
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
7h 28m
Trip: 6 days
Based on null reviews
Tue, Jul 21
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
9h 58m
Sat, Jul 25
SEA
Seattle/Tacoma Airport
IAD
Washington Dulles Airport
6h 21m
Trip: 5 days
Based on null reviews
Mon, Jul 20
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 57m
Mon, Jul 20
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
8h 35m
Trip: 1 days
Based on null reviews
Sun, Jul 19
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
13h 45m
Fri, Jul 31
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
6h 43m
Trip: 13 days
Based on null reviews
Thu, Jul 16
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
9h 58m
Mon, Aug 3
SEA
Seattle/Tacoma Airport
IAD
Washington Dulles Airport
7h 15m
Trip: 19 days
Based on null reviews
Sat, Jul 4
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
9h 40m
Mon, Aug 3
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
6h 43m
Trip: 31 days
Based on null reviews
Fri, Jul 24
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
11h 28m
Sun, Jul 26
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
8h 23m
Trip: 3 days
Based on null reviews
Sat, Aug 1
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
5h 35m
Sun, Aug 9
SEA
Seattle/Tacoma Airport
IAD
Washington Dulles Airport
5h 06m
Trip: 9 days
Based on null reviews
Fri, Aug 7
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 26m
Sat, Aug 8
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
8h 24m
Trip: 2 days
Based on null reviews
Tue, Jul 28
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 10m
Tue, Aug 18
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
7h 25m
Trip: 22 days
Based on null reviews
Fri, Jul 10
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 57m
Sun, Jul 19
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
11h 22m
Trip: 10 days
Based on null reviews
Thu, Jul 30
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
9h 58m
Fri, Jul 31
SEA
Seattle/Tacoma Airport
IAD
Washington Dulles Airport
7h 15m
Trip: 2 days
Based on null reviews
Fri, Jul 17
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 57m
Sun, Jul 26
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
10h 13m
Trip: 10 days
Based on null reviews
Thu, Jul 23
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 16m
Sun, Aug 2
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
7h 18m
Trip: 11 days
Based on null reviews
Fri, Aug 21
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
5h 55m
Sun, Aug 23
SEA
Seattle/Tacoma Airport
IAD
Washington Dulles Airport
4h 57m
Trip: 3 days
Based on null reviews
Fri, Jul 31
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 26m
Mon, Aug 10
SEA
Seattle/Tacoma Airport
DCA
Reagan Washington National Airport
8h 24m
Trip: 11 days
Based on null reviews
Thu, Sep 3
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
5h 55m
Sat, Sep 5
SEA
Seattle/Tacoma Airport
IAD
Washington Dulles Airport
9h 07m
Trip: 3 days
Based on null reviews

Book cheap flights from District of Columbia to Seattle/Tacoma Airport (one-way)

Airports
Origin
Washington
$129
only
$129
$132
only
$132
Destination
Seattle
$129
only
$129
Sat, Aug 1
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
5h 35m
Based on null reviews
Sat, Jul 11
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 15m
Based on null reviews
Mon, Jul 20
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
27h 59m
Based on null reviews
Sun, Jul 19
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
10h 09m
Based on null reviews
Sun, Jul 19
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
10h 14m
Based on null reviews
Mon, Jul 20
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
6h 50m
Based on null reviews
Thu, Aug 6
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
10h 15m
Based on null reviews
Sat, Jul 11
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
10h 03m
Based on null reviews
Tue, Jul 14
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
7h 39m
Based on null reviews
Tue, Jul 14
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
9h 58m
Based on null reviews
Thu, Jul 30
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
8h 15m
Based on null reviews
Mon, Aug 3
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
5h 55m
Based on null reviews
Sat, Jul 11
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
5h 48m
Based on null reviews
Sun, Jul 19
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
6h 50m
Based on null reviews
Sun, Jul 19
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
9h 25m
Based on null reviews
Fri, Aug 14
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
10h 15m
Based on null reviews
Sat, Jul 4
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
9h 40m
Based on null reviews
Fri, Jul 17
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
27h 59m
Based on null reviews
Thu, Jul 30
IAD
Washington Dulles Airport
SEA
Seattle/Tacoma Airport
6h 50m
Based on null reviews
Thu, Aug 6
DCA
Reagan Washington National Airport
SEA
Seattle/Tacoma Airport
10h 15m
Based on null reviews
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

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