Chicago (MDW) to Seattle (SEA), Dec 20–28, 2026: from $360 round trip

Chicago (MDW) to Seattle (SEA), Dec 20–28, 2026: from $360 round trip on Axel, checked Nov 14, 2026. Lowest published fare: $360 round trip, Axel-exclusive, Southwest Airlines, 1 stop, Dec 20–28, 2026, 1 adult, economy, checked Nov 14, 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.

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 nightly rate and the stay's total, from the lowest saved total among the shortlisted hotels in that star tier for those dates.

• Hotels in Seattle for these nights (Dec 20–28, 2026 · 8 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

All hotels in Seattle

Route overview: Chicago to Seattle (SEA) flight deals

2026-12-20 → 2026-12-28 · Axel-exclusive $370

• Southwest Airlines WN3032: MDW 2026-12-20 22:30:00 → SEA 2026-12-21 01:20:00; nonstop; 290 minutes. Local airport times.
• Southwest Airlines WN4975: SEA 2026-12-28 00:15:00 → MDW 2026-12-28 06:05:00; nonstop; 230 minutes. Local airport times.

2026-12-20 → 2026-12-28 · Axel-exclusive $421

• Delta Air Lines DL4711 / DL728: MDW 2026-12-20 09:30:00 → SEA 2026-12-20 14:55:00; 1 stop(s) via DTW; 445 minutes. Local airport times.
  • DL4711: MDW 2026-12-20 09:30:00 → DTW 2026-12-20 11:45:00; layover at DTW: 68 minutes.
  • DL728: DTW 2026-12-20 12:53:00 → SEA 2026-12-20 14:55:00.
• Delta Air Lines DL536 / DL4714: SEA 2026-12-28 08:30:00 → MDW 2026-12-28 16:39:00; 1 stop(s) via MSP; 369 minutes. Local airport times.
  • DL536: SEA 2026-12-28 08:30:00 → MSP 2026-12-28 13:48:00; layover at MSP: 72 minutes.
  • DL4714: MSP 2026-12-28 15:00:00 → MDW 2026-12-28 16:39:00.

2026-12-20 → 2026-12-28 · Axel-exclusive $370

• Southwest Airlines WN1597: MDW 2026-12-20 10:35:00 → SEA 2026-12-20 13:15:00; nonstop; 280 minutes. Local airport times.
• Southwest Airlines WN4975: SEA 2026-12-28 00:15:00 → MDW 2026-12-28 06:05:00; nonstop; 230 minutes. Local airport times.

2026-12-20 → 2026-12-28 · Axel-exclusive $360

• Southwest Airlines WN2998 / WN2455: MDW 2026-12-20 18:05:00 → SEA 2026-12-21 01:00:00; 1 stop(s) via PHX; 535 minutes. Local airport times.
  • WN2998: MDW 2026-12-20 18:05:00 → PHX 2026-12-20 21:00:00; layover at PHX: 105 minutes.
  • WN2455: PHX 2026-12-20 22:45:00 → SEA 2026-12-21 01:00:00.
• Southwest Airlines WN4975: SEA 2026-12-28 00:15:00 → MDW 2026-12-28 06:05:00; nonstop; 230 minutes. Local airport times.

2026-12-20 → 2026-12-28 · Axel-exclusive $360

• Southwest Airlines WN120 / WN244: MDW 2026-12-20 10:50:00 → SEA 2026-12-20 17:50:00; 1 stop(s) via DEN; 540 minutes. Local airport times.
  • WN120: MDW 2026-12-20 10:50:00 → DEN 2026-12-20 12:30:00; layover at DEN: 190 minutes.
  • WN244: DEN 2026-12-20 15:40:00 → SEA 2026-12-20 17:50:00.
• Southwest Airlines WN4975: SEA 2026-12-28 00:15:00 → MDW 2026-12-28 06:05:00; nonstop; 230 minutes. Local airport times.

2026-12-20 → 2026-12-28 · Axel-exclusive $360

• Southwest Airlines WN2691 / WN948: MDW 2026-12-20 05:50:00 → SEA 2026-12-20 13:00:00; 1 stop(s) via LAS; 550 minutes. Local airport times.
  • WN2691: MDW 2026-12-20 05:50:00 → LAS 2026-12-20 07:45:00; layover at LAS: 135 minutes.
  • WN948: LAS 2026-12-20 10:00:00 → SEA 2026-12-20 13:00:00.
• Southwest Airlines WN4975: SEA 2026-12-28 00:15:00 → MDW 2026-12-28 06:05:00; nonstop; 230 minutes. Local airport times.

2026-12-20 → 2026-12-28 · Axel-exclusive $360

• Southwest Airlines WN3020 / WN547: MDW 2026-12-20 06:00:00 → SEA 2026-12-20 13:00:00; 1 stop(s) via SAN; 540 minutes. Local airport times.
  • WN3020: MDW 2026-12-20 06:00:00 → SAN 2026-12-20 08:30:00; layover at SAN: 75 minutes.
  • WN547: SAN 2026-12-20 09:45:00 → SEA 2026-12-20 13:00:00.
• Southwest Airlines WN4975: SEA 2026-12-28 00:15:00 → MDW 2026-12-28 06:05:00; nonstop; 230 minutes. Local airport times.

2026-12-20 → 2026-12-28 · Axel-exclusive $421

• Delta Air Lines DL5469 / DL877: MDW 2026-12-20 10:24:00 → SEA 2026-12-20 16:53:00; 1 stop(s) via MSP; 509 minutes. Local airport times.
  • DL5469: MDW 2026-12-20 10:24:00 → MSP 2026-12-20 12:09:00; layover at MSP: 170 minutes.
  • DL877: MSP 2026-12-20 14:59:00 → SEA 2026-12-20 16:53:00.
• Delta Air Lines DL536 / DL4714: SEA 2026-12-28 08:30:00 → MDW 2026-12-28 16:39:00; 1 stop(s) via MSP; 369 minutes. Local airport times.
  • DL536: SEA 2026-12-28 08:30:00 → MSP 2026-12-28 13:48:00; layover at MSP: 72 minutes.
  • DL4714: MSP 2026-12-28 15:00:00 → MDW 2026-12-28 16:39:00.

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

• All dates for this route
• Dec 19, 2026 · Return options
• Dec 21, 2026 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Chicago (MDW) to Seattle (SEA) · Dec 20, 2026 · return Dec 28, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with its displayed check date. 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 nightly rate and the stay's total, from the lowest saved total 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 Chicago 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.

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