Cheap flights from Missouri to Portland from $125

The cheapest month to fly to Portland from Missouri is in February. Flight prices, which tend to average around $232, 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 Missouri, when ticket prices are also cheap, with an average price of $277.

The cheapest day to depart on your flight to Portland is on a Tuesday when prices can be found for as low as $394. 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 Friday, with ticket prices averaging around $507.

The cheapest time of day to fly to Portland is in the morning when flights can be purchased for as low as $279. In the afternoon is when there is more demand to fly to Portland, so prices are often more expensive at around $446 per ticket.

Fly from Lambert-St Louis to Portland for the best Missouri - Portland flight prices

You are more likely to see cheaper flights to Portland from Missouri when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $376 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from Missouri for as low as $283 on momondo.

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

Southwest, Delta, and United Airlines are the most popular carriers operating from Missouri to Portland

Alaska Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Portland from Missouri according to our data. Alaska Airlines is the first choice among our users, with 45% 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.

As of October 2026, there are 5 flights per week flying from Missouri to Portland. The most common day of the week flights depart is Wed, with 80% of flights taking off on this day.

On average, it takes 3h 52m to fly from Missouri to Portland if you fly out of Kansas City (the most popular airport in Missouri) and into Portland (the most popular airport in Portland). If you’re flying out of St. Louis and into Portland, then the flight time is around 5h 50m.