# Who flies Chicago (any) → Seattle nonstop?

**5 airlines fly Chicago (any) → Seattle nonstop: Alaska Airlines (ORD), American Airlines (ORD), Delta Air Lines (ORD), Southwest Airlines (MDW) and United Airlines (ORD).**

| Airline | Routes | Book direct |
|---|---|---|
| Alaska Airlines | O'Hare (ORD) → Seattle–Tacoma (SEA) | https://www.alaskaair.com |
| American Airlines | O'Hare (ORD) → Seattle–Tacoma (SEA) | https://www.aa.com |
| Delta Air Lines | O'Hare (ORD) → Seattle–Tacoma (SEA) | https://www.delta.com/ |
| Southwest Airlines | Midway (MDW) → Seattle–Tacoma (SEA) | https://www.southwest.com/ |
| United Airlines | O'Hare (ORD) → Seattle–Tacoma (SEA) | https://www.united.com |

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Compare fares for ORD-SEA: [Trip.com](https://www.trip.com/flights/chicago-to-seattle/tickets-ORD-SEA/?allianceid=1094387&sid=2209817&trip_sub1=c4c6f3cbcbb845d69061b1005-713359) · [Aviasales](https://www.aviasales.com/search/ORD1711SEA1?marker=713359). Affiliate links (Trip.com, Aviasales): picktheflight may earn a commission. It never changes the price or which airlines are listed.

On picktheflight: https://picktheflight.com/?from=MDW&fm=1&to=SEA · JSON: https://picktheflight.com/intents/MDW/SEA?fm=1

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Data built 2026-10-26 from airline schedule tables on Wikipedia ("Airlines and destinations"), matched by exact airport article; airline booking sites from Wikidata. Schedules change. Confirm the flight on the airline's own site before booking.