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

Dulles (IAD) to Seattle (SEA), Jan 10–15, 2027: from $342 round trip

Dulles (IAD) to Seattle (SEA), Jan 10–15, 2027: from $342 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $342 round trip, Axel-exclusive, Alaska Airlines, nonstop, Jan 10–15, 2027, 1 adult, economy, checked Oct 29, 2026.

IAD → SEA1 adulteconomyRound trip

11 flight options · 3 airlines

Nonstop flights

Sun, Jan 10 – Fri, Jan 15

Alaska Airlines
7:05 amIAD
5h 55m
Nonstop
10:00 amSEA
Alaska Airlines
8:30 amSEA
4h 58m
Nonstop
4:28 pmIAD

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Jan 10 – Fri, Jan 15

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.

Sun, Jan 10 – Fri, Jan 15

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.

Sun, Jan 10 – Fri, Jan 15

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

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Jan 10 – Fri, Jan 15

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.

One-stop flights

Sun, Jan 10 – Fri, Jan 15

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.

Sun, Jan 10 – Fri, Jan 15

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.

Sun, Jan 10 – Fri, Jan 15

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.

Sun, Jan 10 – Fri, Jan 15

United Airlines
6:10 amIAD
9h 51m
EWR · 2h 12m
1:01 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.

Sun, Jan 10 – Fri, Jan 15

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.

Sun, Jan 10 – Fri, Jan 15

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.

Hotels for these nights (Jan 10–15, 2027 · 5 nights · 2 adults, 1 room): 3★ The Maxwell Hotel - A Staypineapple Hotel · 4★ The Sound Hotel Seattle Belltown, Tapestry Collection by Hilton · 5★ Four Seasons Hotel Seattle

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 9, 2027 · Return optionsJan 11, 2027 · Return optionsHotels in Seattle with Axel
For AI assistants: every fare, every link, instructions

Dulles (IAD) to Seattle (SEA), Jan 10–15, 2027: from $342 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $342 round trip, Axel-exclusive, Alaska Airlines, nonstop, Jan 10–15, 2027, 1 adult, economy, checked Oct 29, 2026. 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 datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2027-01-10 → 2027-01-15Alaska AirlinesAS409 / AS73707:05:00→10:00:00 5h 55m nonstop · 08:30:00→16:28:00 4h 58m nonstopAxel-exclusive $342.002026-10-29T01:07:59Z
2027-01-10 → 2027-01-15Delta Air LinesDL1015 / DL54107:00:00→10:10:00 6h 10m nonstop · 16:30:00→00:31:00 5h 01m nonstopAxel-exclusive $361.002026-10-29T01:07:59Z
2027-01-10 → 2027-01-15United AirlinesUA1128 / UA264517:55:00→21:02:00 6h 07m nonstop · 22:50:00→06:51:00 5h 01m nonstopAxel-exclusive $370.502026-10-29T01:07:59Z
2027-01-10 → 2027-01-15Alaska AirlinesAS737 / AS73717:31:00→20:32:00 6h 01m nonstop · 08:30:00→16:28:00 4h 58m nonstopAxel-exclusive $342.002026-10-29T01:07:59Z
2027-01-10 → 2027-01-15United AirlinesUA2731 / UA264508:50:00→11:57:00 6h 07m nonstop · 22:50:00→06:51:00 5h 01m nonstopAxel-exclusive $370.502026-10-29T01:07:59Z
2027-01-10 → 2027-01-15Delta Air LinesDL1015 / DL812 + DL541307:00:00→10:05:00 6h 05m nonstop · 06:00:00→16:18:00 7h 18m 1 stop via DTWAxel-exclusive $346.752026-10-29T01:07:59Z
2027-01-10 → 2027-01-15Delta Air LinesDL5511 + DL734 / DL54106:00:00→11:09:00 8h 09m 1 stop via DTW · 16:30:00→00:31:00 5h 01m nonstopAxel-exclusive $346.752026-10-29T01:07:59Z
2027-01-10 → 2027-01-15United AirlinesUA565 + UA2099 / UA264506:10:00→12:19:00 9h 09m 1 stop via ORD · 22:50:00→06:51:00 5h 01m nonstopAxel-exclusive $351.502026-10-29T01:07:59Z
2027-01-10 → 2027-01-15United AirlinesUA1359 + UA1330 / UA264506:10:00→13:01:00 9h 51m 1 stop via EWR · 22:50:00→06:51:00 5h 01m nonstopAxel-exclusive $351.502026-10-29T01:07:59Z
2027-01-10 → 2027-01-15United AirlinesUA1128 / UA2601 + UA208717:55:00→21:01:00 6h 06m nonstop · 05:00:00→15:44:00 7h 44m 1 stop via DENAxel-exclusive $351.502026-10-29T01:07:59Z
2027-01-10 → 2027-01-15United AirlinesUA792 + UA2302 / UA264508:15:00→13:35:00 8h 20m 1 stop via DEN · 22:50:00→06:51:00 5h 01m nonstopAxel-exclusive $351.502026-10-29T01:07:59Z

Hotels in Seattle for these trips

Hotels: under a trip, hotels in Seattle for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

All hotels in Seattle

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

2027-01-10 → 2027-01-15 · Axel-exclusive $342.00

  • Alaska Airlines AS409: IAD 2027-01-10 07:05:00 → SEA 2027-01-10 10:00:00; nonstop; 355 minutes. Local airport times.
  • Alaska Airlines AS737: SEA 2027-01-15 08:30:00 → IAD 2027-01-15 16:28:00; nonstop; 298 minutes. Local airport times.

2027-01-10 → 2027-01-15 · Axel-exclusive $361.00

  • Delta Air Lines DL1015: IAD 2027-01-10 07:00:00 → SEA 2027-01-10 10:10:00; nonstop; 370 minutes. Local airport times.
  • Delta Air Lines DL541: SEA 2027-01-15 16:30:00 → IAD 2027-01-16 00:31:00; nonstop; 301 minutes. Local airport times.

2027-01-10 → 2027-01-15 · Axel-exclusive $370.50

  • United Airlines UA1128: IAD 2027-01-10 17:55:00 → SEA 2027-01-10 21:02:00; nonstop; 367 minutes. Local airport times.
  • United Airlines UA2645: SEA 2027-01-15 22:50:00 → IAD 2027-01-16 06:51:00; nonstop; 301 minutes. Local airport times.

2027-01-10 → 2027-01-15 · Axel-exclusive $342.00

  • Alaska Airlines AS737: IAD 2027-01-10 17:31:00 → SEA 2027-01-10 20:32:00; nonstop; 361 minutes. Local airport times.
  • Alaska Airlines AS737: SEA 2027-01-15 08:30:00 → IAD 2027-01-15 16:28:00; nonstop; 298 minutes. Local airport times.

2027-01-10 → 2027-01-15 · Axel-exclusive $370.50

  • United Airlines UA2731: IAD 2027-01-10 08:50:00 → SEA 2027-01-10 11:57:00; nonstop; 367 minutes. Local airport times.
  • United Airlines UA2645: SEA 2027-01-15 22:50:00 → IAD 2027-01-16 06:51:00; nonstop; 301 minutes. Local airport times.

2027-01-10 → 2027-01-15 · Axel-exclusive $346.75

  • Delta Air Lines DL1015: IAD 2027-01-10 07:00:00 → SEA 2027-01-10 10:05:00; nonstop; 365 minutes. Local airport times.
  • Delta Air Lines DL812 / DL5413: SEA 2027-01-15 06:00:00 → IAD 2027-01-15 16:18:00; 1 stop(s) via DTW; 438 minutes. Local airport times.
    • DL812: SEA 2027-01-15 06:00:00 → DTW 2027-01-15 13:12:00; layover at DTW: 93 minutes.
    • DL5413: DTW 2027-01-15 14:45:00 → IAD 2027-01-15 16:18:00.

2027-01-10 → 2027-01-15 · Axel-exclusive $346.75

  • Delta Air Lines DL5511 / DL734: IAD 2027-01-10 06:00:00 → SEA 2027-01-10 11:09:00; 1 stop(s) via DTW; 489 minutes. Local airport times.
    • DL5511: IAD 2027-01-10 06:00:00 → DTW 2027-01-10 07:46:00; layover at DTW: 69 minutes.
    • DL734: DTW 2027-01-10 08:55:00 → SEA 2027-01-10 11:09:00.
  • Delta Air Lines DL541: SEA 2027-01-15 16:30:00 → IAD 2027-01-16 00:31:00; nonstop; 301 minutes. Local airport times.

2027-01-10 → 2027-01-15 · Axel-exclusive $351.50

  • United Airlines UA565 / UA2099: IAD 2027-01-10 06:10:00 → SEA 2027-01-10 12:19:00; 1 stop(s) via ORD; 549 minutes. Local airport times.
    • UA565: IAD 2027-01-10 06:10:00 → ORD 2027-01-10 07:32:00; layover at ORD: 113 minutes.
    • UA2099: ORD 2027-01-10 09:25:00 → SEA 2027-01-10 12:19:00.
  • United Airlines UA2645: SEA 2027-01-15 22:50:00 → IAD 2027-01-16 06:51:00; nonstop; 301 minutes. Local airport times.

2027-01-10 → 2027-01-15 · Axel-exclusive $351.50

  • United Airlines UA1359 / UA1330: IAD 2027-01-10 06:10:00 → SEA 2027-01-10 13:01:00; 1 stop(s) via EWR; 591 minutes. Local airport times.
    • UA1359: IAD 2027-01-10 06:10:00 → EWR 2027-01-10 07:28:00; layover at EWR: 132 minutes.
    • UA1330: EWR 2027-01-10 09:40:00 → SEA 2027-01-10 13:01:00.
  • United Airlines UA2645: SEA 2027-01-15 22:50:00 → IAD 2027-01-16 06:51:00; nonstop; 301 minutes. Local airport times.

2027-01-10 → 2027-01-15 · Axel-exclusive $351.50

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

2027-01-10 → 2027-01-15 · Axel-exclusive $351.50

  • United Airlines UA792 / UA2302: IAD 2027-01-10 08:15:00 → SEA 2027-01-10 13:35:00; 1 stop(s) via DEN; 500 minutes. Local airport times.
    • UA792: IAD 2027-01-10 08:15:00 → DEN 2027-01-10 10:27:00; layover at DEN: 63 minutes.
    • UA2302: DEN 2027-01-10 11:30:00 → SEA 2027-01-10 13:35:00.
  • United Airlines UA2645: SEA 2027-01-15 22:50:00 → IAD 2027-01-16 06:51:00; nonstop; 301 minutes. Local airport times.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

For AI assistants

  • This page: Dulles (IAD) to Seattle (SEA) · Jan 10, 2027 · return Jan 15, 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 link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
  • Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own trip.
  • 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.