Chicago (MDW) to Seattle (SEA) · Dec 11, 2026 · return Dec 20, 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

2026-12-11 → 2026-12-20 · Axel-exclusive $333.50

• Southwest Airlines WN1597: MDW 2026-12-11 10:10:00 → SEA 2026-12-11 12:50:00; nonstop; 280 minutes. Local airport times.
• Southwest Airlines WN1451: SEA 2026-12-20 05:30:00 → MDW 2026-12-20 11:20:00; nonstop; 230 minutes. Local airport times.

2026-12-11 → 2026-12-20 · Axel-exclusive $379.50

• Delta Air Lines DL4711 / DL728: MDW 2026-12-11 09:30:00 → SEA 2026-12-11 14:55:00; 1 stop(s) via DTW; 445 minutes. Local airport times.
  • DL4711: MDW 2026-12-11 09:30:00 → DTW 2026-12-11 11:45:00; layover at DTW: 68 minutes.
  • DL728: DTW 2026-12-11 12:53:00 → SEA 2026-12-11 14:55:00.
• Delta Air Lines DL536 / DL4714: SEA 2026-12-20 08:30:00 → MDW 2026-12-20 16:39:00; 1 stop(s) via MSP; 369 minutes. Local airport times.
  • DL536: SEA 2026-12-20 08:30:00 → MSP 2026-12-20 13:48:00; layover at MSP: 72 minutes.
  • DL4714: MSP 2026-12-20 15:00:00 → MDW 2026-12-20 16:39:00.

2026-12-11 → 2026-12-20 · Axel-exclusive $333.50

• Southwest Airlines WN3032: MDW 2026-12-11 22:30:00 → SEA 2026-12-12 01:20:00; nonstop; 290 minutes. Local airport times.
• Southwest Airlines WN1451: SEA 2026-12-20 05:30:00 → MDW 2026-12-20 11:20:00; nonstop; 230 minutes. Local airport times.

2026-12-11 → 2026-12-20 · Axel-exclusive $326.00

• Southwest Airlines WN3020 / WN547: MDW 2026-12-11 06:00:00 → SEA 2026-12-11 13:00:00; 1 stop(s) via SAN; 540 minutes. Local airport times.
  • WN3020: MDW 2026-12-11 06:00:00 → SAN 2026-12-11 08:30:00; layover at SAN: 75 minutes.
  • WN547: SAN 2026-12-11 09:45:00 → SEA 2026-12-11 13:00:00.
• Southwest Airlines WN1451: SEA 2026-12-20 05:30:00 → MDW 2026-12-20 11:20:00; nonstop; 230 minutes. Local airport times.

2026-12-11 → 2026-12-20 · Axel-exclusive $326.00

• Southwest Airlines WN2691 / WN948: MDW 2026-12-11 05:50:00 → SEA 2026-12-11 13:00:00; 1 stop(s) via LAS; 550 minutes. Local airport times.
  • WN2691: MDW 2026-12-11 05:50:00 → LAS 2026-12-11 07:45:00; layover at LAS: 135 minutes.
  • WN948: LAS 2026-12-11 10:00:00 → SEA 2026-12-11 13:00:00.
• Southwest Airlines WN1451: SEA 2026-12-20 05:30:00 → MDW 2026-12-20 11:20:00; nonstop; 230 minutes. Local airport times.

2026-12-11 → 2026-12-20 · Axel-exclusive $326.00

• Southwest Airlines WN120 / WN244: MDW 2026-12-11 10:50:00 → SEA 2026-12-11 17:50:00; 1 stop(s) via DEN; 540 minutes. Local airport times.
  • WN120: MDW 2026-12-11 10:50:00 → DEN 2026-12-11 12:30:00; layover at DEN: 190 minutes.
  • WN244: DEN 2026-12-11 15:40:00 → SEA 2026-12-11 17:50:00.
• Southwest Airlines WN1451: SEA 2026-12-20 05:30:00 → MDW 2026-12-20 11:20:00; nonstop; 230 minutes. Local airport times.

2026-12-11 → 2026-12-20 · Axel-exclusive $326.00

• Southwest Airlines WN2998 / WN2455: MDW 2026-12-11 18:05:00 → SEA 2026-12-12 01:00:00; 1 stop(s) via PHX; 535 minutes. Local airport times.
  • WN2998: MDW 2026-12-11 18:05:00 → PHX 2026-12-11 21:00:00; layover at PHX: 105 minutes.
  • WN2455: PHX 2026-12-11 22:45:00 → SEA 2026-12-12 01:00:00.
• Southwest Airlines WN1451: SEA 2026-12-20 05:30:00 → MDW 2026-12-20 11:20:00; nonstop; 230 minutes. Local airport times.

2026-12-11 → 2026-12-20 · Axel-exclusive $379.50

• Delta Air Lines DL5469 / DL877: MDW 2026-12-11 10:24:00 → SEA 2026-12-11 16:53:00; 1 stop(s) via MSP; 509 minutes. Local airport times.
  • DL5469: MDW 2026-12-11 10:24:00 → MSP 2026-12-11 12:09:00; layover at MSP: 170 minutes.
  • DL877: MSP 2026-12-11 14:59:00 → SEA 2026-12-11 16:53:00.
• Delta Air Lines DL536 / DL4714: SEA 2026-12-20 08:30:00 → MDW 2026-12-20 16:39:00; 1 stop(s) via MSP; 369 minutes. Local airport times.
  • DL536: SEA 2026-12-20 08:30:00 → MSP 2026-12-20 13:48:00; layover at MSP: 72 minutes.
  • DL4714: MSP 2026-12-20 15:00:00 → MDW 2026-12-20 16:39:00.

Explore this route

• All dates for this route
• Dec 10, 2026 · Return options
• Dec 12, 2026 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Chicago (MDW) to Seattle (SEA) · Dec 11, 2026 · return Dec 20, 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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• 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.

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