Cheap flights from Chicago to Portland from $159

The cheapest month to fly to Portland from Chicago is in February. Flight prices, which tend to average around $289, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in February, then you should wait until January to fly from Chicago, when ticket prices are also cheap, with an average price of $305.

The cheapest day to depart on your flight to Portland is on a Tuesday when prices can be found for as low as $343. 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 $420.

The cheapest time of day to fly to Portland is in the evening when flights can be purchased for as low as $337. At noon is when there is more demand to fly to Portland, so prices are often more expensive at around $454 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 $342 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 $268 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 14% on your flight if you consider stops on a Chicago to Portland flight.

As of August 2026, prices for Chicago to Portland flights are approximately 71% more expensive when compared to flights at the same time last year.

Southwest, United Airlines, and Frontier 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 42% of people opting to fly with this airline when traveling to Portland. Keep in mind that there are 6 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 August 2026. The most frequent departure time is 7:00PM, with 43% of daily flights leaving in the evening.

As of August 2026, there are 136 flights per week flying from Chicago to Portland. The most common day of the week flights depart is Fri, with 24% of flights taking off on this day.