Seattle to Chicago Flights: SEA to ORD Flight Deals & Guide
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Last updated Feb 16, 2026
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Tracking the Apr 2, 2026 departure — the cheapest date we found.
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Chicago (ORD)
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Search FlightsTraveling from the lush Pacific Northwest to the bustling heart of the American Midwest has never been easier, thanks to frequent non-stop service connecting Seattle-Tacoma International Airport (SEA) with Chicago O'Hare International Airport (ORD). This transcontinental route spans approximately 1,721 miles and serves as a vital corridor for both business professionals heading to the Loop and leisure travelers eager to experience Chicago's world-renowned architecture, museums, and culinary scene. Whether you are looking for a quick weekend getaway or a long-term relocation, understanding the nuances of this specific route will help you find the best value for your journey across the northern United States.
Travel Tips
To secure the most competitive fares on the SEA to ORD route, savvy travelers should aim to book their tickets at least three to four weeks in advance. Because Seattle is a primary hub for Alaska Airlines and Chicago O'Hare is a massive hub for United and American Airlines, price competition is fierce; always compare these major carriers before purchasing. Once you land at O'Hare, skip the expensive rideshare lines and opt for the CTA Blue Line 'L' train, which provides a direct and affordable connection to downtown Chicago in about 45 minutes. Finally, remember that Chicago is in the Central Time Zone, which is two hours ahead of Seattle. Adjusting your internal clock during the four-hour flight can help mitigate the effects of jet lag upon arrival.
Airport Information
Seattle (SEA)
Seattle-Tacoma International Airport (SEA), commonly known as Sea-Tac, is the primary commercial airport serving the Seattle metropolitan area. Located about 14 miles south of downtown Seattle, it offers a wide array of amenities including local Pacific Northwest dining favorites, high-speed Wi-Fi, and a significant collection of public art. It serves as a major gateway for international and domestic travel.
Chicago (ORD)
Chicago O'Hare International Airport (ORD) is one of the world's busiest aviation hubs, located on the city's northwest side. It features four operational terminals and serves as a primary base for United Airlines and American Airlines. The airport is famous for its diverse food options, including legendary Chicago-style snacks, and its efficient connection to the city via the 'L' train system.
Seasonal Pricing Patterns
The most expensive times to fly from Seattle to Chicago typically coincide with the summer peak in July and August, as well as the winter holiday season in late December. For those seeking the lowest fares, the 'shoulder seasons' of late spring (April and May) or early autumn (September and October) offer a balance of pleasant weather and lower ticket prices. January and February are often the cheapest months overall, though travelers must be prepared for Chicago's intense winter conditions and potential flight delays due to snow.
Frequently Asked Questions
How long is the flight from Seattle (SEA) to Chicago (ORD)?
The average non-stop flight duration is approximately 4 hours and 15 minutes, though eastbound flights may be slightly faster due to prevailing jet streams.
Which airlines offer direct flights between SEA and ORD?
Major carriers offering non-stop service include Alaska Airlines, United Airlines, and American Airlines, with multiple departures available daily.
What is the time difference between Seattle and Chicago?
Chicago is 2 hours ahead of Seattle. When it is 12:00 PM in Seattle (Pacific Time), it is 2:00 PM in Chicago (Central Time).
Is there a train from O'Hare to downtown Chicago?
Yes, the Chicago Transit Authority (CTA) Blue Line train runs directly from Terminal 2 at O'Hare to the downtown Loop area 24 hours a day.
When is the best time to book a flight for the lowest price?
Generally, booking at least 21 days in advance and choosing mid-week departures (Tuesdays or Wednesdays) yields the lowest fares for this route.