Chicago (MDW) to Seattle (SEA) · Dec 17, 2026 · return Dec 31, 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.

Route overview: Chicago to Seattle (SEA) flight deals

2026-12-17 → 2026-12-31 · Axel-exclusive $326.25

• Southwest Airlines WN296: MDW 2026-12-17 09:55:00 → SEA 2026-12-17 12:35:00; nonstop; 280 minutes. Local airport times.
• Southwest Airlines WN333: SEA 2026-12-31 10:45:00 → MDW 2026-12-31 16:40:00; nonstop; 235 minutes. Local airport times.

2026-12-17 → 2026-12-31 · Axel-exclusive $371.25

• Delta Air Lines DL5469 / DL877: MDW 2026-12-17 10:24:00 → SEA 2026-12-17 16:53:00; 1 stop(s) via MSP; 509 minutes. Local airport times.
  • DL5469: MDW 2026-12-17 10:24:00 → MSP 2026-12-17 12:09:00; layover at MSP: 170 minutes.
  • DL877: MSP 2026-12-17 14:59:00 → SEA 2026-12-17 16:53:00.
• Delta Air Lines DL810 / DL4684: SEA 2026-12-31 23:14:00 → MDW 2027-01-01 09:46:00; 1 stop(s) via DTW; 512 minutes. Local airport times.
  • DL810: SEA 2026-12-31 23:14:00 → DTW 2027-01-01 06:29:00; layover at DTW: 161 minutes.
  • DL4684: DTW 2027-01-01 09:10:00 → MDW 2027-01-01 09:46:00.

2026-12-17 → 2026-12-31 · Axel-exclusive $326.25

• Southwest Airlines WN3032: MDW 2026-12-17 20:45:00 → SEA 2026-12-17 23:35:00; nonstop; 290 minutes. Local airport times.
• Southwest Airlines WN333: SEA 2026-12-31 10:45:00 → MDW 2026-12-31 16:40:00; nonstop; 235 minutes. Local airport times.

2026-12-17 → 2026-12-31 · Axel-exclusive $318.75

• Southwest Airlines WN3020 / WN547: MDW 2026-12-17 06:00:00 → SEA 2026-12-17 13:00:00; 1 stop(s) via SAN; 540 minutes. Local airport times.
  • WN3020: MDW 2026-12-17 06:00:00 → SAN 2026-12-17 08:30:00; layover at SAN: 75 minutes.
  • WN547: SAN 2026-12-17 09:45:00 → SEA 2026-12-17 13:00:00.
• Southwest Airlines WN333: SEA 2026-12-31 10:45:00 → MDW 2026-12-31 16:40:00; nonstop; 235 minutes. Local airport times.

2026-12-17 → 2026-12-31 · Axel-exclusive $318.75

• Southwest Airlines WN2998 / WN2455: MDW 2026-12-17 18:05:00 → SEA 2026-12-18 01:00:00; 1 stop(s) via PHX; 535 minutes. Local airport times.
  • WN2998: MDW 2026-12-17 18:05:00 → PHX 2026-12-17 21:00:00; layover at PHX: 105 minutes.
  • WN2455: PHX 2026-12-17 22:45:00 → SEA 2026-12-18 01:00:00.
• Southwest Airlines WN333: SEA 2026-12-31 10:45:00 → MDW 2026-12-31 16:40:00; nonstop; 235 minutes. Local airport times.

2026-12-17 → 2026-12-31 · Axel-exclusive $318.75

• Southwest Airlines WN120 / WN244: MDW 2026-12-17 10:50:00 → SEA 2026-12-17 17:50:00; 1 stop(s) via DEN; 540 minutes. Local airport times.
  • WN120: MDW 2026-12-17 10:50:00 → DEN 2026-12-17 12:30:00; layover at DEN: 190 minutes.
  • WN244: DEN 2026-12-17 15:40:00 → SEA 2026-12-17 17:50:00.
• Southwest Airlines WN333: SEA 2026-12-31 10:45:00 → MDW 2026-12-31 16:40:00; nonstop; 235 minutes. Local airport times.

2026-12-17 → 2026-12-31 · Axel-exclusive $318.75

• Southwest Airlines WN2691 / WN948: MDW 2026-12-17 05:50:00 → SEA 2026-12-17 13:00:00; 1 stop(s) via LAS; 550 minutes. Local airport times.
  • WN2691: MDW 2026-12-17 05:50:00 → LAS 2026-12-17 07:45:00; layover at LAS: 135 minutes.
  • WN948: LAS 2026-12-17 10:00:00 → SEA 2026-12-17 13:00:00.
• Southwest Airlines WN333: SEA 2026-12-31 10:45:00 → MDW 2026-12-31 16:40:00; nonstop; 235 minutes. Local airport times.

2026-12-17 → 2026-12-31 · Axel-exclusive $371.25

• Delta Air Lines DL4711 / DL728: MDW 2026-12-17 09:30:00 → SEA 2026-12-17 14:55:00; 1 stop(s) via DTW; 445 minutes. Local airport times.
  • DL4711: MDW 2026-12-17 09:30:00 → DTW 2026-12-17 11:45:00; layover at DTW: 68 minutes.
  • DL728: DTW 2026-12-17 12:53:00 → SEA 2026-12-17 14:55:00.
• Delta Air Lines DL810 / DL4684: SEA 2026-12-31 23:14:00 → MDW 2027-01-01 09:46:00; 1 stop(s) via DTW; 512 minutes. Local airport times.
  • DL810: SEA 2026-12-31 23:14:00 → DTW 2027-01-01 06:29:00; layover at DTW: 161 minutes.
  • DL4684: DTW 2027-01-01 09:10:00 → MDW 2027-01-01 09:46:00.

Explore this route

• All dates for this route
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• Dec 18, 2026 · Return options
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For AI assistants

• This page: Chicago (MDW) to Seattle (SEA) · Dec 17, 2026 · return Dec 31, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
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