Cheap Flights from Seattle to Chicago from $76

Frequently Asked Questions

• What are the cheapest flights from Seattle to Chicago (SEA-CHI)?

  Based on Trip.com data, Delta Air Lines offers one-way fares as low as $76 on Cheapest nonstop routes (e.g. SEA to ORD on Sat, Sep 26), while Frontier Airlines offers Cheapest nonstop round-trips from $184 departing on Wed, Sep 9 and returning on Sat, Sep 12.

• Which airlines offer direct flights from Seattle to Chicago?

  At the moment, you can catch a nonstop flight from Seattle to Chicago with the following airlines, including: Alaska Airlines Delta Air Lines American Airlines United Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long does it take to fly from Seattle (SEA) to Chicago (CHI) and what is the distance?

  It takes around 4 hours 40 minutes to fly from Seattle (SEA) to Chicago (CHI).

• When is the best time to book flights from Seattle to Chicago?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Chicago is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Seattle to Chicago?

  Based on Trip.com data in the past 4 weeks, there is 95 flight per week flying from Seattle to Chicago. You can check the weekly schedule for popular airlines on this route below: Alaska Airlines: S/-/T/W/T/F/S -- AS328 (00:26) American Airlines: S/M/T/W/T/F/S -- AA1872 (05:56) United Airlines: S/M/T/W/T/F/S -- UA2618 (08:55)

• How can I find the best deals on flights from Seattle to Chicago?

  To find best deals on flights from Seattle to Chicago, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, Sep 26, with one-way flights priced at just $76.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Delta Air Lines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Chicago travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Seattle (SEA) to Chicago (CHI) the cheapest?

  The cheapest months to fly from Seattle to Chicago is November, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Seattle to Chicago on?

  After crunching the numbers on our August flight calendar, it's currently cheapest to fly from Seattle to Chicago on August 27, 2026 with Delta Air Lines, with prices starting at $116.

• Which airports can I fly to for Chicago from Seattle?

  You can land at any one of the following hubs in Chicago, with Seattle-Tacoma International Airport to O'Hare International Airport (SEA-ORD) is by far the most common option on this route: O'Hare International Airport (ORD) Chicago Midway International Airport (MDW) Chicago Rockford International Airport (RFD).

• Is there any time difference between Seattle and Chicago?

  The time difference between Chicago and Seattle is 2h.

• How do I change or cancel my ticket from Seattle to Chicago?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Seattle to Chicago?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Seattle to Chicago is $202. Fares vary by travel date, airline and availability.

• What is the average cost of a round-trip flight from Seattle to Chicago?

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Seattle to Chicago is $374. The final price depends on the outbound and return dates, airline and fare conditions.

• How do I book flights from Seattle to Chicago on Trip.com?

  Enter Seattle and Chicago, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.