$177 Cheap Delta flights Chicago (MDW) to Seattle (SEA)

Apply the “Price (lowest to highest)” filter on Expedia to find cheap Delta Air Lines round-trip flights from $343 from MDW to SEA. Affordable one-way options from $177 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Search for one-way or return flights to Seattle in January or February. You could find an affordable fare with Delta Air Lines during these off-peak months.

Begin your search one to three months ahead of your travel date to get cheaper fares on Delta Air Lines flights from Midway Intl. Airport (MDW) to Seattle - Tacoma Intl. Airport (SEA). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic flights.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Click on the “Nonstop” filter when searching for direct Delta Air Lines flights from MDW to SEA. It’s also an easy way to compare other airlines servicing the same direct trip.

To find the earliest departures from MDW to SEA with Delta Air Lines, filter your search by “Morning” and “Early Morning.” Booking an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Delta Air Lines flights from Midway Intl. Airport (MDW) to Seattle land at Seattle - Tacoma Intl. Airport (SEA). This is the main gateway to this city.

Offering an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is a top choice for many travelers flying from MDW to SEA. Also, if you’re a Delta SkyMiles and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which you can put toward future getaways.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are generally free within 24 hours of booking, but your airline may charge a fee after that. For more details about modifying your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you want the freedom to adjust your plans without being charged, check the “Changes included” or “No cancel fee” filter when planning your next adventure.