$129 Cheap Delta flights Seattle (SEA) to Kansas City (MCI)

Grab affordable round-trip Delta Air Lines flights from $257 from SEA to MCI by sorting your results from "Price (lowest to highest)" on Expedia. Or search for options from $129 for a one-way journey.**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.

Look for cheap Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA) to Kansas City Intl. Airport (MCI) one to three months ahead of your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and itinerary, the best day of the week to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**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.

The first Delta Air Lines flight from SEA to MCI departs at 6:40PM UTC-8, touching down at 12:09AM UTC-6. If you'd like to head off later, the last Delta Air Lines flight leaves SEA at 6:40PM UTC-8 and lands at MCI at 12:09AM UTC-6. Flying before noon is generally a smart choice as morning flights tend to experience fewer cancellations.**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.

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