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Route overview: Seattle to Dulles (IAD) flight deals

Seattle → Dulles

Jan 26, 2027 · return Feb 2, 2027

SEA → IAD1 adulteconomyRound trip

11 flight options · 3 airlines

Nonstop flights

Tue, Jan 26 – Tue, Feb 2

Alaska Airlines
8:30 amSEA
4h 58m
Nonstop
4:28 pmIAD
Alaska Airlines
5:31 pmIAD
6h 1m
Nonstop
8:32 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Jan 26 – Tue, Feb 2

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

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Jan 26 – Tue, Feb 2

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

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Jan 26 – Tue, Feb 2

Alaska Airlines
9:45 pmSEA
5h
Nonstop
5:45 am+1IAD
Alaska Airlines
5:31 pmIAD
6h 1m
Nonstop
8:32 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Jan 26 – Tue, Feb 2

United Airlines
8:09 amSEA
4h 59m
Nonstop
4:08 pmIAD
United Airlines
5:55 pmIAD
6h 7m
Nonstop
9:02 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Tue, Jan 26 – Tue, Feb 2

Alaska Airlines
12:30 amSEA
7h 53m
DFW · 1h 10m
11:23 amIAD
Alaska Airlines
5:31 pmIAD
6h 1m
Nonstop
8:32 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Jan 26 – Tue, Feb 2

United Airlines
10:50 amSEA
7h 23m
ORD · 1h 10m
9:13 pmIAD
United Airlines
5:55 pmIAD
6h 7m
Nonstop
9:02 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Jan 26 – Tue, Feb 2

Delta Air Lines
10:40 pmSEA
7h 29m
ATL · 1h 13m
9:09 am+1IAD
Delta Air Lines
7:00 amIAD
6h 10m
Nonstop
10:10 amSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Jan 26 – Tue, Feb 2

Delta Air Lines
1:25 pmSEA
7h 22m
SLC · 1h 25m
11:47 pmIAD
Delta Air Lines
7:00 amIAD
6h 10m
Nonstop
10:10 amSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Jan 26 – Tue, Feb 2

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

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Jan 26 – Tue, Feb 2

Delta Air Lines
4:30 pmSEA
4h 50m
Nonstop
12:20 am+1IAD
Delta Air Lines
7:00 amIAD
8h 36m
SLC · 1h 21m
12:36 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Make this trip yours

SEA ⇄ IAD

Economy

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

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Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

Explore this route

All dates for this routeJan 25, 2027 · Return optionsJan 27, 2027 · Return optionsHotels in Washington, DC 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)
2027-01-26 → 2027-02-02Alaska AirlinesAS737 / AS737Axel-exclusive $408.502026-10-29T01:15:29Z
2027-01-26 → 2027-02-02United AirlinesUA2645 / UA1128Axel-exclusive $418.002026-10-29T01:15:29Z
2027-01-26 → 2027-02-02Delta Air LinesDL541 / DL1015Axel-exclusive $427.502026-10-29T01:15:29Z
2027-01-26 → 2027-02-02Alaska AirlinesAS367 / AS737Axel-exclusive $408.502026-10-29T01:15:29Z
2027-01-26 → 2027-02-02United AirlinesUA1348 / UA1128Axel-exclusive $418.002026-10-29T01:15:29Z
2027-01-26 → 2027-02-02Alaska AirlinesAS424 + AA3320 / AS737Axel-exclusive $394.252026-10-29T01:15:29Z
2027-01-26 → 2027-02-02United AirlinesUA747 + UA2202 / UA1128Axel-exclusive $403.752026-10-29T01:15:29Z
2027-01-26 → 2027-02-02Delta Air LinesDL567 + DL1324 / DL1015Axel-exclusive $413.252026-10-29T01:15:29Z
2027-01-26 → 2027-02-02Delta Air LinesDL1120 + DL847 / DL1015Axel-exclusive $413.252026-10-29T01:15:29Z
2027-01-26 → 2027-02-02Delta Air LinesDL812 + DL5413 / DL1015Axel-exclusive $413.252026-10-29T01:15:29Z
2027-01-26 → 2027-02-02Delta Air LinesDL541 / DL432 + DL2995Axel-exclusive $413.252026-10-29T01:15:29Z

Route overview: Seattle to Dulles (IAD) flight deals

2027-01-26 → 2027-02-02 · Axel-exclusive $408.50

  • Alaska Airlines AS737: SEA 2027-01-26 08:30:00 → IAD 2027-01-26 16:28:00; nonstop; 298 minutes. Local airport times.
  • Alaska Airlines AS737: IAD 2027-02-02 17:31:00 → SEA 2027-02-02 20:32:00; nonstop; 361 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $418.00

  • United Airlines UA2645: SEA 2027-01-26 22:50:00 → IAD 2027-01-27 06:51:00; nonstop; 301 minutes. Local airport times.
  • United Airlines UA1128: IAD 2027-02-02 17:55:00 → SEA 2027-02-02 21:02:00; nonstop; 367 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $427.50

  • Delta Air Lines DL541: SEA 2027-01-26 16:30:00 → IAD 2027-01-27 00:31:00; nonstop; 301 minutes. Local airport times.
  • Delta Air Lines DL1015: IAD 2027-02-02 07:00:00 → SEA 2027-02-02 10:10:00; nonstop; 370 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $408.50

  • Alaska Airlines AS367: SEA 2027-01-26 21:45:00 → IAD 2027-01-27 05:45:00; nonstop; 300 minutes. Local airport times.
  • Alaska Airlines AS737: IAD 2027-02-02 17:31:00 → SEA 2027-02-02 20:32:00; nonstop; 361 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $418.00

  • United Airlines UA1348: SEA 2027-01-26 08:09:00 → IAD 2027-01-26 16:08:00; nonstop; 299 minutes. Local airport times.
  • United Airlines UA1128: IAD 2027-02-02 17:55:00 → SEA 2027-02-02 21:02:00; nonstop; 367 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $394.25

  • Alaska Airlines AS424 / AA3320: SEA 2027-01-26 00:30:00 → IAD 2027-01-26 11:23:00; 1 stop(s) via DFW; 473 minutes. Local airport times.
    • AS424: SEA 2027-01-26 00:30:00 → DFW 2027-01-26 06:20:00; layover at DFW: 70 minutes.
    • AA3320: DFW 2027-01-26 07:30:00 → IAD 2027-01-26 11:23:00.
  • Alaska Airlines AS737: IAD 2027-02-02 17:31:00 → SEA 2027-02-02 20:32:00; nonstop; 361 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $403.75

  • United Airlines UA747 / UA2202: SEA 2027-01-26 10:50:00 → IAD 2027-01-26 21:13:00; 1 stop(s) via ORD; 443 minutes. Local airport times.
    • UA747: SEA 2027-01-26 10:50:00 → ORD 2027-01-26 17:00:00; layover at ORD: 70 minutes.
    • UA2202: ORD 2027-01-26 18:10:00 → IAD 2027-01-26 21:13:00.
  • United Airlines UA1128: IAD 2027-02-02 17:55:00 → SEA 2027-02-02 21:02:00; nonstop; 367 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $413.25

  • Delta Air Lines DL567 / DL1324: SEA 2027-01-26 22:40:00 → IAD 2027-01-27 09:09:00; 1 stop(s) via ATL; 449 minutes. Local airport times.
    • DL567: SEA 2027-01-26 22:40:00 → ATL 2027-01-27 06:12:00; layover at ATL: 73 minutes.
    • DL1324: ATL 2027-01-27 07:25:00 → IAD 2027-01-27 09:09:00.
  • Delta Air Lines DL1015: IAD 2027-02-02 07:00:00 → SEA 2027-02-02 10:10:00; nonstop; 370 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $413.25

  • Delta Air Lines DL1120 / DL847: SEA 2027-01-26 13:25:00 → IAD 2027-01-26 23:47:00; 1 stop(s) via SLC; 442 minutes. Local airport times.
    • DL1120: SEA 2027-01-26 13:25:00 → SLC 2027-01-26 16:26:00; layover at SLC: 85 minutes.
    • DL847: SLC 2027-01-26 17:51:00 → IAD 2027-01-26 23:47:00.
  • Delta Air Lines DL1015: IAD 2027-02-02 07:00:00 → SEA 2027-02-02 10:10:00; nonstop; 370 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $413.25

  • Delta Air Lines DL812 / DL5413: SEA 2027-01-26 06:00:00 → IAD 2027-01-26 16:18:00; 1 stop(s) via DTW; 438 minutes. Local airport times.
    • DL812: SEA 2027-01-26 06:00:00 → DTW 2027-01-26 13:12:00; layover at DTW: 93 minutes.
    • DL5413: DTW 2027-01-26 14:45:00 → IAD 2027-01-26 16:18:00.
  • Delta Air Lines DL1015: IAD 2027-02-02 07:00:00 → SEA 2027-02-02 10:10:00; nonstop; 370 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $413.25

  • Delta Air Lines DL541: SEA 2027-01-26 16:30:00 → IAD 2027-01-27 00:20:00; nonstop; 290 minutes. Local airport times.
  • Delta Air Lines DL432 / DL2995: IAD 2027-02-02 07:00:00 → SEA 2027-02-02 12:36:00; 1 stop(s) via SLC; 516 minutes. Local airport times.
    • DL432: IAD 2027-02-02 07:00:00 → SLC 2027-02-02 09:54:00; layover at SLC: 81 minutes.
    • DL2995: SLC 2027-02-02 11:15:00 → SEA 2027-02-02 12:36:00.

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For AI assistants

  • This page: Seattle (SEA) to Dulles (IAD) · Jan 26, 2027 · return Feb 2, 2027: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • 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 Seattle to Dulles (IAD) 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.