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Route overview: Washington, DC to Seattle (SEA) flight deals

Dulles → Seattle

Jan 21, 2027 · return Jan 25, 2027

IAD → SEA1 adulteconomyRound trip

11 flight options · 3 airlines

Nonstop flights

Thu, Jan 21 – Mon, Jan 25

Alaska Airlines
5:18 pmIAD
6h 9m
Nonstop
8:27 pmSEA
Alaska Airlines
9:45 pmSEA
5h
Nonstop
5:45 am+1IAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Mon, Jan 25

Delta Air Lines
7:00 amIAD
6h 10m
Nonstop
10:10 amSEA
Delta Air Lines
4:30 pmSEA
5h 1m
Nonstop
12:31 am+1IAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Mon, Jan 25

United Airlines
8:50 amIAD
6h 7m
Nonstop
11:57 amSEA
United Airlines
10:50 pmSEA
5h 1m
Nonstop
6:51 am+1IAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Mon, Jan 25

Alaska Airlines
7:05 amIAD
5h 55m
Nonstop
10:00 amSEA
Alaska Airlines
9:45 pmSEA
5h
Nonstop
5:45 am+1IAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Mon, Jan 25

United Airlines
5:55 pmIAD
6h 7m
Nonstop
9:02 pmSEA
United Airlines
10:50 pmSEA
5h 1m
Nonstop
6:51 am+1IAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Thu, Jan 21 – Mon, Jan 25

Alaska Airlines
7:00 amIAD
6h 5m
Nonstop
10:05 amSEA
Alaska Airlines
12:30 amSEA
7h 53m
DFW · 1h 10m
11:23 amIAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Mon, Jan 25

Delta Air Lines
7:00 amIAD
6h 5m
Nonstop
10:05 amSEA
Delta Air Lines
6:00 amSEA
7h 18m
DTW · 1h 33m
4:18 pmIAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Mon, Jan 25

Delta Air Lines
6:00 amIAD
8h 9m
DTW · 1h 9m
11:09 amSEA
Delta Air Lines
4:30 pmSEA
5h 1m
Nonstop
12:31 am+1IAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Mon, Jan 25

United Airlines
5:55 pmIAD
6h 6m
Nonstop
9:01 pmSEA
United Airlines
5:00 amSEA
7h 44m
DEN · 1h 39m
3:44 pmIAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Mon, Jan 25

United Airlines
6:10 amIAD
9h 9m
ORD · 1h 53m
12:19 pmSEA
United Airlines
10:50 pmSEA
5h 1m
Nonstop
6:51 am+1IAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Mon, Jan 25

United Airlines
8:15 amIAD
8h 20m
DEN · 1h 3m
1:35 pmSEA
United Airlines
10:50 pmSEA
5h 1m
Nonstop
6:51 am+1IAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Make this trip yours

IAD ⇄ SEA

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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Explore this route

All dates for this routeJan 20, 2027 · Return optionsJan 22, 2027 · Return optionsHotels in Seattle with Axel
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2027-01-21 → 2027-01-25Alaska AirlinesAS737 / AS367Axel-exclusive $342.002026-10-29T01:07:59Z
2027-01-21 → 2027-01-25Delta Air LinesDL1015 / DL541Axel-exclusive $361.002026-10-29T01:07:59Z
2027-01-21 → 2027-01-25United AirlinesUA2731 / UA2645Axel-exclusive $370.502026-10-29T01:07:59Z
2027-01-21 → 2027-01-25Alaska AirlinesAS409 / AS367Axel-exclusive $342.002026-10-29T01:07:59Z
2027-01-21 → 2027-01-25United AirlinesUA1128 / UA2645Axel-exclusive $370.502026-10-29T01:07:59Z
2027-01-21 → 2027-01-25Alaska AirlinesAS409 / AS424 + AA3320Axel-exclusive $327.752026-10-29T01:07:59Z
2027-01-21 → 2027-01-25Delta Air LinesDL1015 / DL812 + DL5413Axel-exclusive $346.752026-10-29T01:07:59Z
2027-01-21 → 2027-01-25Delta Air LinesDL5511 + DL734 / DL541Axel-exclusive $346.752026-10-29T01:07:59Z
2027-01-21 → 2027-01-25United AirlinesUA1128 / UA2601 + UA2087Axel-exclusive $351.502026-10-29T01:07:59Z
2027-01-21 → 2027-01-25United AirlinesUA565 + UA2099 / UA2645Axel-exclusive $351.502026-10-29T01:07:59Z
2027-01-21 → 2027-01-25United AirlinesUA792 + UA2302 / UA2645Axel-exclusive $351.502026-10-29T01:07:59Z

Hotels in Seattle for these trips

Hotels: under a trip, hotels in Seattle for exactly those nights: the lowest 3★, 4★, 5★ stay totals among the city's featured hotels, Axel's price for 2 adults in 1 room, each opening that hotel's page for those dates with the rooms and the booking link.

All hotels in Seattle

Route overview: Washington, DC to Seattle (SEA) flight deals

2027-01-21 → 2027-01-25 · Axel-exclusive $342.00

  • Alaska Airlines AS737: IAD 2027-01-21 17:18:00 → SEA 2027-01-21 20:27:00; nonstop; 369 minutes. Local airport times.
  • Alaska Airlines AS367: SEA 2027-01-25 21:45:00 → IAD 2027-01-26 05:45:00; nonstop; 300 minutes. Local airport times.

2027-01-21 → 2027-01-25 · Axel-exclusive $361.00

  • Delta Air Lines DL1015: IAD 2027-01-21 07:00:00 → SEA 2027-01-21 10:10:00; nonstop; 370 minutes. Local airport times.
  • Delta Air Lines DL541: SEA 2027-01-25 16:30:00 → IAD 2027-01-26 00:31:00; nonstop; 301 minutes. Local airport times.

2027-01-21 → 2027-01-25 · Axel-exclusive $370.50

  • United Airlines UA2731: IAD 2027-01-21 08:50:00 → SEA 2027-01-21 11:57:00; nonstop; 367 minutes. Local airport times.
  • United Airlines UA2645: SEA 2027-01-25 22:50:00 → IAD 2027-01-26 06:51:00; nonstop; 301 minutes. Local airport times.

2027-01-21 → 2027-01-25 · Axel-exclusive $342.00

  • Alaska Airlines AS409: IAD 2027-01-21 07:05:00 → SEA 2027-01-21 10:00:00; nonstop; 355 minutes. Local airport times.
  • Alaska Airlines AS367: SEA 2027-01-25 21:45:00 → IAD 2027-01-26 05:45:00; nonstop; 300 minutes. Local airport times.

2027-01-21 → 2027-01-25 · Axel-exclusive $370.50

  • United Airlines UA1128: IAD 2027-01-21 17:55:00 → SEA 2027-01-21 21:02:00; nonstop; 367 minutes. Local airport times.
  • United Airlines UA2645: SEA 2027-01-25 22:50:00 → IAD 2027-01-26 06:51:00; nonstop; 301 minutes. Local airport times.

2027-01-21 → 2027-01-25 · Axel-exclusive $327.75

  • Alaska Airlines AS409: IAD 2027-01-21 07:00:00 → SEA 2027-01-21 10:05:00; nonstop; 365 minutes. Local airport times.
  • Alaska Airlines AS424 / AA3320: SEA 2027-01-25 00:30:00 → IAD 2027-01-25 11:23:00; 1 stop(s) via DFW; 473 minutes. Local airport times.
    • AS424: SEA 2027-01-25 00:30:00 → DFW 2027-01-25 06:20:00; layover at DFW: 70 minutes.
    • AA3320: DFW 2027-01-25 07:30:00 → IAD 2027-01-25 11:23:00.

2027-01-21 → 2027-01-25 · Axel-exclusive $346.75

  • Delta Air Lines DL1015: IAD 2027-01-21 07:00:00 → SEA 2027-01-21 10:05:00; nonstop; 365 minutes. Local airport times.
  • Delta Air Lines DL812 / DL5413: SEA 2027-01-25 06:00:00 → IAD 2027-01-25 16:18:00; 1 stop(s) via DTW; 438 minutes. Local airport times.
    • DL812: SEA 2027-01-25 06:00:00 → DTW 2027-01-25 13:12:00; layover at DTW: 93 minutes.
    • DL5413: DTW 2027-01-25 14:45:00 → IAD 2027-01-25 16:18:00.

2027-01-21 → 2027-01-25 · Axel-exclusive $346.75

  • Delta Air Lines DL5511 / DL734: IAD 2027-01-21 06:00:00 → SEA 2027-01-21 11:09:00; 1 stop(s) via DTW; 489 minutes. Local airport times.
    • DL5511: IAD 2027-01-21 06:00:00 → DTW 2027-01-21 07:46:00; layover at DTW: 69 minutes.
    • DL734: DTW 2027-01-21 08:55:00 → SEA 2027-01-21 11:09:00.
  • Delta Air Lines DL541: SEA 2027-01-25 16:30:00 → IAD 2027-01-26 00:31:00; nonstop; 301 minutes. Local airport times.

2027-01-21 → 2027-01-25 · Axel-exclusive $351.50

  • United Airlines UA1128: IAD 2027-01-21 17:55:00 → SEA 2027-01-21 21:01:00; nonstop; 366 minutes. Local airport times.
  • United Airlines UA2601 / UA2087: SEA 2027-01-25 05:00:00 → IAD 2027-01-25 15:44:00; 1 stop(s) via DEN; 464 minutes. Local airport times.
    • UA2601: SEA 2027-01-25 05:00:00 → DEN 2027-01-25 08:41:00; layover at DEN: 99 minutes.
    • UA2087: DEN 2027-01-25 10:20:00 → IAD 2027-01-25 15:44:00.

2027-01-21 → 2027-01-25 · Axel-exclusive $351.50

  • United Airlines UA565 / UA2099: IAD 2027-01-21 06:10:00 → SEA 2027-01-21 12:19:00; 1 stop(s) via ORD; 549 minutes. Local airport times.
    • UA565: IAD 2027-01-21 06:10:00 → ORD 2027-01-21 07:32:00; layover at ORD: 113 minutes.
    • UA2099: ORD 2027-01-21 09:25:00 → SEA 2027-01-21 12:19:00.
  • United Airlines UA2645: SEA 2027-01-25 22:50:00 → IAD 2027-01-26 06:51:00; nonstop; 301 minutes. Local airport times.

2027-01-21 → 2027-01-25 · Axel-exclusive $351.50

  • United Airlines UA792 / UA2302: IAD 2027-01-21 08:15:00 → SEA 2027-01-21 13:35:00; 1 stop(s) via DEN; 500 minutes. Local airport times.
    • UA792: IAD 2027-01-21 08:15:00 → DEN 2027-01-21 10:27:00; layover at DEN: 63 minutes.
    • UA2302: DEN 2027-01-21 11:30:00 → SEA 2027-01-21 13:35:00.
  • United Airlines UA2645: SEA 2027-01-25 22:50:00 → IAD 2027-01-26 06:51:00; nonstop; 301 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Dulles (IAD) to Seattle (SEA) · Jan 21, 2027 · return Jan 25, 2027: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in Seattle for exactly those nights: the lowest 3★, 4★ and 5★ stay totals for 2 adults in 1 room, each linking to that hotel's page for those dates.
  • Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Washington, DC to Seattle (SEA) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.