C$ 204 Find Cheap Flights from Chicago to Seattle – Compare and Save

Among airlines operating Chicago O'Hare Intl Airport to Seattle flights:

• Alaska Airlines: offers extra legroom; offers free seat selection
• United Airlines: offers extra legroom; offers free seat selection
• American Airlines: offers extra legroom; offers free seat selection
• Delta: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

4 airlines operate flights between Chicago O'Hare Intl Airport and Seattle. The airlines offering direct flights on this route include:

• American Airlines
• Alaska Airlines
• United Airlines
• Delta

Flights from Chicago O'Hare Intl Airport to Seattle usually depart from Chicago O'Hare Intl (ORD) and arrive at Seattle/Tacoma Intl (SEA).

Here are some options for this route, based on selected ticket types and cabin classes:

• Alaska Airlines: a carry-on bag and a checked bag in Economy Class
• United Airlines: a carry-on bag and a checked bag in Economy Class
• American Airlines: a carry-on bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route, and airline, so travellers should check the fare details before booking.

Only Economy Class is available on flights from Chicago O'Hare Intl Airport to Seattle.

On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 321 round-trip via Denver Intl (DEN), compared to C$ 501 for direct.

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 49–C$ 140 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

The Boeing 737-900 family is used most often on this route, operated mainly by Delta and United Airlines. Other aircraft seen on the route include Airbus A321-100/200 variants.

One-stop flights from Chicago O'Hare Intl Airport to Seattle most commonly connect through:

• Denver Intl (DEN) – 75% of one-stop connections
• Las Vegas Harry Reid Intl (LAS) – 7% of one-stop connections
• Los Angeles Los Angeles (LAX) – 7% of one-stop connections
• Portland (PDX) – 7% of one-stop connections

Denver Intl (DEN) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 10% on the Chicago O'Hare Intl Airport to Seattle route. Wednesday is the cheapest departure day at C$ 492 round-trip on average, while Sunday is the most expensive at C$ 541, a difference of C$ 49. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Morning is the busiest departure period on Chicago O'Hare Intl Airport to Seattle flights, with 42% leaving in that window. Afternoon departures account for 30%, Evening flights for 23%, and Night flights for 5%.

Some of the most popular sights in Seattle are Lumen Field, T-Mobile Park, and Seattle Waterfront. These are among the most viewed places in Seattle on KAYAK.

These are the earliest and latest flight times available from Chicago O'Hare Intl Airport to Seattle:

• Earliest: departs at 6:00 am and lands at 10:47 am
• Latest: departs at 10:00 pm and lands at 2:47 am.

The flight takes about 4h 47m.

Last-minute fares on this route – booked within 2 weeks of departure – run 39% above the route average of C$ 498. Book 5 weeks before departure for the lowest fares.

A direct flight from Chicago O'Hare Intl Airport to Seattle takes 4h 47m, covering 4,442 km.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 380 to C$ 1,224. That means the highest observed fare was about 3x higher than the lowest one.

One-way fares from Chicago O'Hare Intl Airport to Seattle are currently lower than usual. Average one-way flight prices are about C$ 228, which is 26% below the typical average for this route.

Flying via Portland (PDX) gives the shortest average 1-stop total travel time at 7h 25m, compared with 14h 05m via Minneapolis St Paul (MSP) and 14h 39m via Denver Intl (DEN).

Seattle is 2 hours behind Chicago O'Hare Intl Airport (Pacific Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around C$ 5 for economy cars. Top options include:
• Fox
• Europcar
• Thrifty
• Budget
• Dollar

Round-trip flights from Chicago O'Hare Intl Airport to Seattle range from C$ 380 to C$ 613, with an average of C$ 498 over the past 12 months. Anything below C$ 380 counts as a good deal.

Three airlines offer in-flight Wi-Fi on Chicago O'Hare Intl Airport to Seattle flights:

• Alaska Airlines
• American Airlines
• Delta

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.