Open interactive map →Cheap flights from Seattle to Chicago
Fares on the Seattle to Chicago route vary noticeably by season and demand. Right now the lowest available price is €99. The route offers both direct and connecting options depending on the date. Booking further in advance typically unlocks lower prices, especially around school holidays and peak travel months. The calendar below maps out the cheapest and most expensive months so you can plan before committing to dates.
Price patterns on the Seattle to Chicago route tend to spike during school holidays and public holiday weekends. Booking 4-6 weeks out generally balances availability and price well on this route. If your travel dates are flexible, check the price calendar for the lowest-priced months before searching for specific flights.
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Cheapest month to fly
- October 2026€991 stopCheapest
Based on tracked fares, October is the cheapest month to fly this route at around €99.
Prices last updated: September 2026
Entry requirements for United States
EU passportESTA required (visa-waiver)
US passportN/A (domestic)
Requirements vary by nationality and change without notice. Check requirements for your nationality →
About Chicago
Chicago is the great American city that the coasts overlook - a dense, architecturally extraordinary lakefront city with world-class museums, deep-dish pizza, and jazz and blues venues that trace the music's northern migration. O'Hare (ORD) and Midway (MDW) together give the city one of the world's widest airport choices.
Alternative routes
Other ways to reach Chicago
Frequently asked questions
How much does a flight from Seattle to Chicago cost?
The cheapest fare currently available from Seattle to Chicago is €99. Prices on this route vary by season, day of week, and how far in advance you book. The month-by-month price calendar on this page shows exactly when fares are highest and lowest, so you can pick the most cost-effective window before searching for specific dates. Fares are refreshed regularly as our flight partners publish new availability.
Are there direct flights from Seattle to Chicago?
SkyHopp tracks both direct and connecting flights from Seattle to Chicago. Connecting flights are often priced lower but add travel time due to the layover. Whether a non-stop option exists on specific dates depends on airline schedules - use the "Direct only" filter on the interactive map to see non-stop options, or check the booking site for a full breakdown by stop count.
When is the cheapest time to fly from Seattle to Chicago?
Prices on this route typically dip during shoulder-season months, away from school holidays and public holiday windows. Mid-week departures - particularly Tuesday to Thursday - tend to be cheaper than flights on Fridays and Sundays from Seattle. The month-by-month price calendar above is the fastest way to identify the cheapest window - look for the months with the lowest fares before committing to travel dates. Booking 3-6 weeks in advance generally offers the best balance of price and seat availability on this route.