From United, travel nonstop from Washington Dulles to Chicago for $218 round-trip, including all taxes, on United.

As seen below, we found seats departing IAD on Wednesday, September 3, returning from ORD on Saturday, September 6.

Other dates are also available for travel on Mondays through Thursdays, as well as Saturdays, through late October.

You'll find lower nonstop fares available from Spirit Airlines on select dates.

For booking info, see our Fare Details.

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