$147 Cheap Sun Country Airlines flights Chicago (ORD) to Seattle (SEA)

Use the “Price (lowest to highest)” filter on Expedia to look for cheap Sun Country Airlines round-trip flights from $303 from ORD to SEA. Affordable one-way options from $147 are available as well.**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 round-trip or one-way flights to Seattle in January or February. You could find a cheap fare with Sun Country Airlines during these off-peak months.

To find cheap Sun Country Airlines fares from O’Hare Intl. Airport (ORD) to Seattle - Tacoma Intl. Airport (SEA), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the cost. Sunday is generally the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking on a Sunday.**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.

To find out if there’s a direct route from ORD to SEA with Sun Country Airlines or any other carriers, use our “Nonstop” filter when looking for tickets.

To find the earliest departures from ORD to SEA with Sun Country Airlines, filter your search by “Early Morning” and “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.

Seattle - Tacoma Intl. Airport (SEA) is the main Seattle gateway for Sun Country Airlines flights from O’Hare Intl. Airport (ORD).

On Sun Country Airlines, you can fly standard economy from ORD to SEA with a small personal item and 1 cabin bag. Your carry-on bag should be no bigger than 23 inches x 10 inches x 15 inches and weigh less than 33 lb. Exceeding baggage restrictions can result in additional charges, so read your carrier’s latest policies before making your booking.

Taking off from ORD to SEA with Sun Country Airlines comes with a range of perks, such as top-tier customer service and a rewarding loyalty program. Plus, when you book through Expedia, One Key™ members can earn OneKeyCash™* to spend on select future travel purchases. That’s in addition to the Sun Country Rewards points you can earn with Sun Country Airlines.*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 add a charge after that. For more information about altering your reservation, head to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to update your itinerary without additional charges, apply the “No cancel fee” or “Changes included” filter when planning your next break.