Flight Time from Chicago (ORD) to Seattle (SEA)

Non-stop, the ORD–SEA sector prices out at 3.95 hours — 2,789 km at 850 km/h plus 40 minutes of taxi, climb and approach. One connection is the realistic worst case for most calendars: expect the total to land near 7 hours with a single well-chosen hub, and near 11.9 hours with two.

This 2,789 km length is the sweet spot where non-stops dominate schedules but one-stop fares are often dramatically cheaper. The clock moves 2 h back (UTC−6 → UTC−8), so a morning departure can land well into the local evening.

Flexible-flier trick: price ORD against SEA and then against each nearby field below — secondary endpoints within 700 km sometimes clear the fare by a full cabin class. From ORD, reaching YVR instead takes about 0.9 h — less airborne time than the 3.95 h non-stop, and the surface leg into Seattle still has to be won back.

Where a matching calculator page exists (ORD → YVR among them) the links are in the Related list below. Weigh each alternative against its back-distance to Seattle — from ORD, a cheap fare hundreds of km from your actual destination is rarely cheap once the surface leg is priced.

Put a departure hour on the math: wheels-up at 10:00 from ORD puts you on the ground at SEA around 11:57 local time, once the 2-hour loss is applied. Hotel, meal and transit averages put a Seattle day at $253 against $230 in Chicago — worth weighing against any fare premium for better flight times.

On those numbers Chicago is the cheaper place to linger — the gap is $23 per day, which over a week funds a second flight. Flying west to Seattle costs 2 hours of local day, which makes the 3.95-hour block feel longer than it reads.