$142 Find Cheap Flights from Chicago O'Hare Airport to Seattle - Compare and Save

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 10:48 am
• Latest: departs at 10:00 pm and lands at 2:48 am.

The flight takes about 4h 48m.

Four cabin classes are available on flights from Chicago O'Hare Intl Airport to Seattle:

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

A nonstop flight from Chicago O'Hare Intl Airport to Seattle takes 4h 48m, covering 1,715 miles.

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.

Round-trip flights from Chicago O'Hare Intl Airport to Seattle range from $272 to $439, with an average of $356 over the past 12 months. Anything below $272 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 39% above the $356 route average. Book 5 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $230 round-trip via Denver Intl (DEN), compared to $358 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $35–$100 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.

Morning is the busiest departure period on Chicago O'Hare Intl Airport to Seattle flights, with 38% of flights leaving in that window. Afternoon departures account for 31%, evening flights for 25%, and night flights for 6%.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $274 to $946. That means the highest observed fare was about 3x higher than the lowest one.

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.

One-way fares from Chicago O'Hare Intl Airport to Seattle are currently lower than usual. Average one-way flight prices are about $155, which is 30% below the typical average for this route.

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:

• Fox
• Europcar
• Thrifty
• Budget
• Dollar

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

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 (LAX) - 7% of one-stop connections
• Portland (PDX) - 7% of one-stop connections

Yes. Flexible dates can save you up to 10% on flights from Chicago O'Hare Intl Airport to Seattle. Wednesday is the cheapest departure day at $352 round-trip on average, while Sunday is the most expensive at $387, a difference of $35.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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

• American Airlines
• Alaska Airlines
• United Airlines
• Delta

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.

Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

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.

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

• Alaska Airlines: a cabin bag and a checked bag in Economy Class
• United Airlines: a cabin bag and a checked bag in Economy Class
• American Airlines: a cabin bag and a checked bag in Economy Class

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

SEA has taken several measures to ensure passengers can safely maneuver through the airport barrier-free. Step-free access has been provided throughout the airport complex. Reserved spots are also available in the parking garage for drivers with limited mobility. The airport also provides wheelchair assistance, and in partnership with Aira, the visually impaired also get assistance at SEA.

ORD encourages families to travel through their gateway and has provided services to keep families comfortable. Baby care facilities are provided in every terminal for nursing mothers looking to breastfeed in comfort and privacy. There’s a family lounge at ORD equipped with toys, climbing structures, and video games, where kids can burn off that extra energy before the flight. There are also family restrooms with baby changing facilities provided all around the airport.

Several nonstop flights are offered from Chicago to Seattle. Around 1,045 kg of carbon is emitted per passenger on flights from Seattle to Chicago. However, this amount is significantly reduced when you fly with United Airlines, Alaska Airlines, and Delta. These airlines emit 62%, 53%, and 51% less carbon per passenger on their flights from Ord to SEA.

King County Metro Buses are the first option for getting downtown. You’ll find these buses opposite the Sea-Tac Airport LINK Light Rail station, and the departure timetable is posted at the bus stop. The other option is the LINK Light Rail system. Trains run every 6-15min, and you’ll find them on the fourth floor of the airport parking garage. Several companies offer shuttle services from the airport, and taxis are also available on the third floor of the airport garage. The rental car facility is just outside baggage claim for those willing to self-drive.