Vuelos de United de Chicago (ORD) a Seattle (SEA) desde $75

For any current Sea-Tac Airport travel advice and quarantine requirements, visit our Covid-19 Travel Advisor. Look before you book your flight, so you don’t get caught out.

If you’re flying from O’Hare Intl. Airport (ORD) to SEA with United Airlines, you’ll probably be taking off from terminal 1. Your airline should be able to let you know which terminal you’ll be arriving at.

With United Airlines offering direct services between O’Hare Airport and SEA, your next grand adventure is a single flight away. Wave goodbye to the hassle, inconvenience and luggage mix-ups that are often associated with stopovers, and book your ticket today.

Your United Airlines flight from O’Hare Intl. Airport (ORD) to Seattle - Tacoma Intl. Airport (SEA) should take around 5 hours and 21 minutes. But there are lots of things you can do to keep yourself busy. Chatting to the person next to you about the travel experiences they’ve had is one of them. If you’d prefer a different sort of in-flight entertainment, you could always watch a TV show.

The Boeing 737-900 and the Boeing 737-800 are the two types of aircraft models usually used by United Airlines between ORD and SEA.

When journeying from ORD to SEA, you’ll find roughly 4 United Airlines daily flights to select from.

For more info about changing your flight to SEA, 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.