Cheap flights from Seattle to Portland from $93

The cheapest month to fly to Portland from Seattle is in January. Flight prices, which tend to average around $99, 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 August to fly from Seattle, when ticket prices are also cheap, with an average price of $137.

The cheapest day to depart on your flight to Portland is on a Friday when prices can be found for as low as $347. 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 $441.

The cheapest time of day to fly to Portland is in the morning when flights can be purchased for as low as $367. At noon is when there is more demand to fly to Portland, so prices are often more expensive at around $457 per ticket.

Fly from Seattle/Tacoma Intl to Portland for the best Seattle/Tacoma Intl - Portland flight prices

You are more likely to see cheaper flights to Portland from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $210 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from Seattle for as low as $127 on momondo.

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

Frontier and Delta are the most popular carriers operating from Seattle/Tacoma Intl to Portland

Alaska Airlines, Delta and Hawaiian Airlines are the top three most popular airlines that fly to Portland from Seattle according to our data. Alaska Airlines is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Portland. Keep in mind that there are 4 different airlines that fly to Portland on a routine basis, so you have a few additional options to choose from.

As of March 2026, 32 flights take off from Seattle and land in Portland each day. The most common flight departure time for this route is 3:00PM, with 45% of daily flights taking off in the evening.

225 flights are operational weekly from Seattle to Portland as of March 2026. The most popular departure day for this route is Sat, with 22% of flights per week taking off on this day.