Cheap Flights from Chicago to Seattle | EazAir
Chicago to Seattle flight insights
Average flight time
~4h 14m (estimated)
ORD → SEA
Cheapest month
—
Based on cached fare history
Cheapest cached price
$145
Checking live fares…
Prices shown may not be current. Last checked: Sep 5, 2026.
Planning a trip from Chicago to Seattle? The average flight time on this route is ~4h 14m (estimated). The lowest fare we have cached for this route is $145 (last checked Sep 5, 2026).
Route Quick Facts
| Origin | Chicago (ORD) |
|---|---|
| Destination | Seattle (SEA) |
| Average Flight Time | — |
| Cheapest Month to Fly | — |
| Current Lowest Fare | $145 |
| Fares Last Checked | Sep 5, 2026 |
Flight deals from Chicago to Seattle
Departing from either O'Hare International Airport (ORD) or Midway International Airport (MDW), travelers head directly to Seattle-Tacoma International Airport (SEA). Direct flights from Chicago to Seattle are readily available through carriers like Alaska Airlines, United Airlines, and American Airlines. Passengers preferring to fly out of Midway can often find Southwest Airlines routes connecting through other regional hubs before landing in Washington state. The typical nonstop flight duration from Chicago to Seattle is approximately four hours and thirty minutes, covering an aerial distance of roughly 1,730 miles. Because this route crosses multiple time zones, passengers leave the Central Time Zone and arrive in the Pacific Time Zone, gaining two hours upon landing at Sea-Tac. Early morning departures from Illinois often allow travelers to arrive in King County with the entire afternoon ahead of them. Summer represents the peak travel season for this corridor, with July and August seeing the highest passenger volumes as tourists leave the Midwest for mild Pacific Northwest weather. Fares typically spike during these high-demand summer months, as well as around late-year holidays. To secure cheaper tickets from Chicago to Seattle, budget-conscious travelers should consider flying in late January or February, avoiding the peak demand periods and maximizing savings on partner OTA platforms.
About Seattle
Popular areas to know in Seattle include Capitol Hill, Ballard, and Fremont.
Mild, wet winters and dry, mild summers — the Pacific Northwest's rainy reputation is strongest from October through April.
Frequently asked questions
How long is the direct flight from Chicago to Seattle?
Which airlines operate nonstop flights from Chicago to Seattle?
Which airports will I use when flying from Chicago to Seattle?
When is the best time to book cheap flights from Chicago to Seattle?
What are the standard baggage allowances for a flight from Chicago to Seattle?
Are morning or evening flights from Chicago to Seattle cheaper?
What is the total flight distance from Chicago to Seattle?
What is the cheapest month to fly from Chicago to Seattle?
Where are common layovers on connecting flights from Chicago to Seattle?
How does the time zone change affect a flight from Chicago to Seattle?
How do I get to downtown upon arriving from Chicago to Seattle?
Airline baggage policies
Baggage allowances differ significantly between fare classes (Basic/Light vs. Standard/Flex) and can change over time. Always verify the exact allowance for your specific fare with the airline before you fly.
| Airline | Cabin bag | Checked bag |
|---|---|---|
| Delta Air Lines | 1 carry-on + 1 personal item on most fares | 1 checked bag typically included on Main Cabin and above; Basic Economy usually excludes it |
| American Airlines | 1 carry-on + 1 personal item on most fares | 1 checked bag typically included on Main Cabin and above; Basic Economy usually excludes it |
| United Airlines | 1 carry-on + 1 personal item on most fares | 1 checked bag typically included on Economy and above; Basic Economy usually excludes it |
| Southwest Airlines | 1 carry-on + 1 personal item | 2 checked bags included on every fare — a long-standing, well-known Southwest policy |
| JetBlue Airways | 1 personal item on the cheapest (Blue Basic) fare; a carry-on is added on higher fares | Not included on Blue Basic; typically included from Blue Plus and above |
| Alaska Airlines | 1 carry-on + 1 personal item on most fares | 1 checked bag typically included on Main and above; Saver fares usually exclude it |
| Spirit Airlines | 1 personal item included; a full-sized carry-on is a paid add-on | Not included on the base fare — a paid add-on at every fare tier |
| Frontier Airlines | 1 personal item included; a full-sized carry-on is a paid add-on | Not included on the base fare — a paid add-on at every fare tier |
Travel tips
Arrive early for domestic flights
TSA generally recommends arriving at least 2 hours before a domestic departure, more at larger hub airports during peak travel periods.
Pack a mixed carry-on
Keep a change of clothes, chargers, and any essentials in your carry-on rather than only your checked bag, in case of a delay or a bag that doesn't arrive with you.
Ease jet lag on longer routes
On longer cross-country flights, adjusting your sleep schedule a day or two before departure and staying hydrated in flight can reduce jet lag on arrival.
Screenshot your confirmation
Save a screenshot or PDF of your booking confirmation and boarding pass before you travel, in case you lose signal or battery at the airport.
Check in online when it opens
Most airlines open online check-in 24 hours before departure — checking in early can help with seat selection and, on some airlines, boarding group assignment.
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