Seattle to Washington (SEA–DCA) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
SEA–DCA is served by 2 airlines with nonstop service. Alaska Airlines and Delta Air Lines lead the route. The flight covers 2,323 miles in approximately 4h 57m. Beyond nonstop, 56 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| AS Alaska Airlines Also: HA, KE | 14 | 7M8, B38M | 5h16-5h28 | Oneworld | HA, KE | |
| DL Delta Air Lines | 7 | 75W | 4h57 | SkyTeam | – |
Weekly Schedule Pattern
Connection Landscape
Other ways to reach Washington from Seattle
| Metric | SEA→DCA | BFI→DCA |
|---|---|---|
| Distance from SEA | – | 5 mi |
| Nonstop airlines | 2 | 1 |
| Weekly flights | 28 | – |
| Flight time | 4h 57m | 5h 8m |
| Departure OTP | 77% | – |
Travel Essentials
SEA: PDT · DCA: EDT
When it's 6:00 PM in Seattle, it's 9:00 PM in Washington.
Link Light Rail runs from downtown Seattle (Westlake station) to the airport in 38 minutes ($3.50 peak). Trains run every 6–12 minutes during peak hours from 5am to 1am. Ride-shares run $30–50 from downtown; SR-99 and I-5 can be heavily congested southbound during afternoon rush (3–7pm).
Sound Transit 574 express bus serves Tacoma ($2.50–4). Sounder commuter rail connects Tacoma to the airport area via a shuttle.
The Metro station is inside Terminal B/C with covered walkway access; Terminal A requires a short outdoor walk or shuttle. Yellow and Blue line trains run to downtown DC in 15–25 minutes for $2.25–$3.85.
Taxis and Uber/Lyft operate from designated pick-up zones outside each terminal; fares to downtown run $15–30. DCA serves the National Mall area and is well-positioned for the U.S. Capitol, Pentagon, and downtown offices. International arrivals clear customs at DCA only for pre-cleared flights; most international traffic uses IAD (Dulles). Rental cars are in a consolidated facility accessible by shuttle.
Humid subtropical climate. Summers (June–August) are hot and very humid at 29–34°C with frequent afternoon thunderstorms causing ground stops and airspace flow programs. The summer storm season is the primary operational disruption risk at DCA. Spring and autumn are transitional with variable conditions and occasional severe thunderstorm outbreaks.
Winters (December–February) bring cold temperatures (−2 to 7°C) with occasional snowstorms that disproportionately affect the DC area due to limited snow-removal infrastructure. Even moderate snowfall (5–10 cm) can shut regional airports for hours. Pack layers for winter; the region's storm response is notoriously inconsistent.
SEA–DCA Quick Facts
Frequently Asked Questions
Flights from SEA to DCA
Seattle–Tacoma International Airport (SEA) and Ronald Reagan Washington National Airport (DCA) are connected by nonstop service from Alaska Airlines and Delta Air Lines. With 28 weekly departures, this is a heavily served route.
SEA to DCA Flight Duration and Schedule
Nonstop flight time from SEA to DCA ranges from 4 hours 57 minutes to 5 hours 28 minutes. The route covers a distance of 2,323 miles (3,738 km). There are approximately 28 weekly flights outbound and 42 return, totaling 70 flights per week in both directions.
Connecting Options and Alternatives
56 one-stop connections are available, with the fastest taking approximately 6 hours via BFI. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Seattle (BFI).