Cheap flights from Washington to Chicago from $158

The month of January is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from State of Washington averaging around $279.

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Wednesday when prices can be found for as low as $433. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday is the most expensive day to depart from State of Washington because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $528.

Flying to Chicago O'Hare Intl Airport from State of Washington in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $380 when looking at flights departing in the afternoon. Try not to purchase tickets at noon because they tend to be around $486. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Seattle/Tacoma Intl to Chicago O'Hare Intl for the best Washington - Chicago O'Hare Intl flight prices

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $349 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from State of Washington for as low as $288 on momondo.

There are 4 cabin classes available to choose from on State of Washington to Chicago O'Hare Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier, Alaska Airlines, and Delta are the most popular carriers operating from Washington to Chicago O'Hare Intl

Alaska Airlines, American Airlines and Delta are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 29% of people opting to fly with this airline when traveling to Chicago O'Hare Intl Airport. Keep in mind that there are 5 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

The number of flights available between State of Washington and Chicago O'Hare Intl Airport is 43 per day as of September 2026. The most frequent departure time is 6:00AM, with 64% of daily flights leaving at noon.

The number of flights available between State of Washington and Chicago O'Hare Intl Airport is 304 per week as of September 2026. The most frequent departure day is Tue, with 19% of weekly flights leaving on this day.