The sector is held by Alaska Airlines, American Airlines, Delta Air Lines, United Airlines, China Airlines and Korean Air.
Airport pair · hand carry reference
SEA Seattle to ORD Chicago
Seattle Tacoma International, the United States, to O'Hare International, the United States. Computed from the scheduled network held on 2026-09-07.
- Nonstop
- 20.3 times a day
- Great circle
- 2,762 km
- Block, estimated
- 4h 02m
- Door to door
- 10h 47m
What SEA to ORD looks like
The SEA to ORD sector, the carriers on it and the flying time, before anything is promised to anybody.
Seattle SEA to Chicago ORD is a medium haul sector of 2,762 km by great circle, flown nonstop 20.3 times a day.
At the cruise speed this site models for 2,762 km, 830 km an hour, and thirty minutes of taxi at the two ends, the flight blocks at about 4h 02m.
Seattle SEA is a large airport in the network held here, 145 scheduled destinations and 717.9 departures a day. Chicago ORD has 295 destinations and 1,461 departures a day.
Chicago is 2 hours ahead of Seattle all year.
The pair sits inside the Americas, a corridor where the site already publishes 13 written lanes that go into customs and ground detail this page does not.
Who flies the sector, and how often
Average daily frequencies on SEA to ORD from the scheduled route statistics, both directions, with the operating carriers named.
| Direction | Flights a day | Flights a week | Operated by |
|---|---|---|---|
| SEA to ORD | 20.29 | 142 | Alaska Airlines, American Airlines, Delta Air Lines, United Airlines |
| ORD to SEA | 19.86 | 139 | Alaska Airlines, American Airlines, China Airlines, Delta Air Lines, Korean Air, United Airlines |
6 carriers are recorded on the sector, so a missed departure is normally a rebooking rather than a lost day.
At 20.3 times a day there is usually another departure within a few hours, which is what makes a same day booking on this pair realistic.
Between them the two directions put about 281.1 departures a week on SEA to ORD, which is the number that decides whether a seat can be found today or on Thursday.
The clock from collection to signature
The same ground timings the route calculator starts from, applied to the 4h 02m block time on SEA to ORD. Change any of them in the tool further down and the total moves with them.
| Stage | Allowed | Elapsed |
|---|---|---|
| Collection and the run to SEA | 90 min | 1h 30m |
| At SEA before departure | 180 min | 4h 30m |
| SEA to ORD in the air, estimated | 242 min | 8h 32m |
| Formalities at ORD | 90 min | 10h 02m |
| Delivery run in Chicago | 45 min | 10h 47m |
| Door to door | 647 min | 10h 47m |
On the desk standard ground timings, ninety minutes to collect and reach the airport, three hours at the airport before departure, ninety minutes of arrival formalities and a forty five minute delivery run, the door to door figure for SEA to ORD is 10h 47m.
A courier who leaves Seattle at 09:00 local is on the ground in Chicago at about 15:02 local and at the door by 17:17 the same day.
Working backwards from a six in the evening handover in Chicago, the last useful departure from Seattle is around 09:43 local.
When the nonstop does not work
Every airport that joins the two ends, ranked by when they land, among the ones whose weaker leg is dependable enough to plan on. Connection time is allowed for the size of the hub. 71 of them join SEA to ORD.
| Connecting at | SEA to hub, flights a day | Hub to ORD, flights a day | Track, km | Estimated, gate to gate |
|---|---|---|---|---|
| Milwaukee MKE | 2.29 | 19.14 | 2,827 | 5h 38m |
| Minneapolis MSP | 11.43 | 17.29 | 2,782 | 5h 54m |
| Boise BOI | 15.86 | 3.57 | 2,948 | 5h 54m |
| Kansas City MCI | 3.71 | 15 | 3,039 | 6h 00m |
| Omaha OMA | 1.86 | 11.43 | 2,863 | 6h 02m |
| Chicago MDW | 3.29 | 0.57 | 2,807 | 6h 05m |
With 20.3 times a day on the nonstop, a connection here is a disruption plan rather than a routing, and it is listed because a closed runway or a cancellation wave is exactly when nobody has time to work it out.
71 airports connect the two ends on the scheduled network held here. The quickest of the dependable ones is Milwaukee MKE, where the weaker of the two legs still runs about twice a day.
Through MKE the routing covers 2,827 km against the 2,762 km nonstop track and takes about 5h 38m in the air and on the ground at the hub, allowing 60 minutes to connect at an airport of that size.
That is only 1h 36m more than the nonstop, which is close enough that a connection is worth taking when the nonstop is full or badly timed.
Behind it, Minneapolis MSP at 5h 54m and Boise BOI at 5h 54m hold the same connection, so a booking has three hubs to try before it has to wait for the nonstop.
If nothing suitable leaves Seattle, Victoria YYJ is 157 km away by great circle and carries 22 scheduled destinations of its own, which is usually a shorter road transfer than a lost day.
If nothing suitable leaves Chicago, Chicago MDW is 25 km away by great circle and carries 208 scheduled destinations of its own, which is usually a shorter road transfer than a lost day.
Industry within reach of the two ends
Public manufacturing and research sites whose logistics run through SEA or ORD. Listed as industrial geography, not as customers of anyone.
- Boeing, Everett and RentonWidebody and 737 final assembly. A European supplier base and an American line, eight time zones apart. Logistics through Seattle SEA.
Plan Seattle to Chicago yourself
The same tool the dispatchers use, open to anybody and free. It is loaded with this pair already. Change either end, add a stopover or a preferred airline, and it works out the connection, the transit and the door to door clock, with the real departures underneath. Put it on your own site if it is useful to you.
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Restrictions
Where this came from, and where to look next
- Carriers and frequencies: AeroDataBox scheduled route statistics, retrieved 2026-09-07. Average daily flights, not a timetable.
- Distances: great circle from published coordinates. They read short against a flown track, which is why the block time above applies a factor to them.
- Block and connection times: the same model the route calculator lower down this page runs, at the same rounding.
- Restrictions: the airport notes file, checked 2026-09-07.
- Industrial sites: public company information. Nothing here says or implies that any company named is a customer of any courier operator.
Who publishes this. OnBoard Courier is a placement desk in Dubai. An assignment is carried out by a vetted partner operator, with the desk as the single point of contact from the quote to the signature. This page exists because our own dispatchers need the answer for SEA to ORD in the twenty minutes before a promise is made, and a reference only one operator can read is not a reference. Free to read, quote and cite. Found an error? Tell us and we will correct it.
If you need something moved rather than looked up, the desk prices a hand carry in fifteen minutes.
- The SEA airport entry
- The ORD airport entry
- Hand carry into the United States
- The written lane, Dubai to Seattle
- The written lane, Seattle to Nagoya
- The written lane, Abu Dhabi to Chicago
- The route calculator
More pairs through SEA and ORD: Chicago to Boston, Chicago to Atlanta, London to Chicago, San Francisco to Chicago, Chicago to Detroit, Chicago to Paris, Chicago to Dublin, Chicago to Los Angeles.