Cheap flights from Chicago to Portland from $135

The cheapest month to fly to Portland from Chicago is in January. Flight prices, which tend to average around $257, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in January, then you should wait until May to fly from Chicago, when ticket prices are also cheap, with an average price of $269.

The cheapest day to depart on your flight to Portland is on a Tuesday when prices can be found for as low as $322. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Sunday, with ticket prices averaging around $381.

The cheapest time of day to fly to Portland is in the evening when flights can be purchased for as low as $318. At noon is when there is more demand to fly to Portland, so prices are often more expensive at around $461 per ticket.

Fly from Chicago O'Hare Intl to Portland for the best Chicago - Portland flight prices

You are more likely to see cheaper flights to Portland from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $325 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from Chicago for as low as $198 on momondo.

There are 4 cabin classes available to choose from on Chicago to Portland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 28% on your flight if you consider stops on a Chicago to Portland flight.

As of April 2026, prices for Chicago to Portland flights are approximately 6% more expensive when compared to flights at the same time last year.

Delta, Southwest, and Alaska Airlines are the most popular carriers operating from Chicago to Portland

United Airlines, American Airlines and Alaska Airlines are the top three most popular airlines that fly to Portland from Chicago according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Portland. Keep in mind that there are 7 different airlines that fly to Portland on a routine basis, so you have a few additional options to choose from.

The number of flights available between Chicago and Portland is 19 per day as of April 2026. The most frequent departure time is 8:00PM, with 48% of daily flights leaving in the evening.

As of April 2026, there are 139 flights per week flying from Chicago to Portland. The most common day of the week flights depart is Sun, with 19% of flights taking off on this day.