Vuelos de United de Seattle (SEA) a Chicago (ORD) desde $80

For information on any current O’Hare Airport quarantine requirements and travel advice, visit the Covid-19 Travel Advisor. Check before you arrange your flight, so you don’t get caught up en route.

While we can’t say for certain exactly which terminal your United Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to O’Hare Intl. Airport (ORD) will set off from, we can tell you that it’s likely you’ll be getting off the plane at terminal 1.

It is possible to fly direct from Seattle - Tacoma Intl. Airport (SEA) to O’Hare Airport with United Airlines and avoid the hassles of stopovers. The less time you spend getting to your destination, the more time you’ll have for new experiences.

As it will take around 4 hours and 34 minutes for your United Airlines flight to get from Seattle - Tacoma Intl. Airport (SEA) to O’Hare Intl. Airport (ORD), consider packing a few travel games in your cabin bag. You never know — the person next to you might love the chance to play to break up the journey.

When you zip through the clouds between SEA and ORD with United Airlines, you’ll probably be doing it aboard the Boeing 737-900. The carrier also operates the Boeing 737 MAX 9 on this route.

If you’d like to book a trip from SEA to ORD, you can select from around 4 United Airlines flights daily.

For more info about changing your flight to ORD, please visit our Customer Service Portal.

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.