Cheap Flights From Seattle - Tacoma Intl. (SEA) To O'Hare Intl. (ORD)

If you're heading from Seattle to Chicago, there is a good range of airlines that'll fly you there. Choose a seat with these popular air companies offering direct flights from Seattle - Tacoma Intl. Airport (SEA) to ORD:

• Alaska Airlines - (AS) with 152 flights every month
• United Airlines - (UA) with 152 flights every month
• American Airlines - (AA) with 112 flights every month
• Delta - (DL) with 78 flights every month

Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca 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 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.