Cheap flights from Houston to Portland from $140

The cheapest month to fly to Portland from Houston is in November. Flight prices, which tend to average around $64, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in November, then you should wait until September to fly from Houston, when ticket prices are also cheap, with an average price of $88.

The cheapest time of day to fly to Portland is at noon when flights can be purchased for as low as $267. In the morning is when there is more demand to fly to Portland, so prices are often more expensive at around $420 per ticket.

Fly from Houston George Bush Intcntl to Portland for the best Houston - Portland flight prices

You are more likely to see cheaper flights to Portland from Houston when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $316 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from Houston for as low as $234 on momondo.

Frontier, Southwest, and Delta are the most popular carriers operating from Houston to Portland

United Airlines, Alaska Airlines and Frontier are the top three most popular airlines that fly to Portland from Houston according to our data. United Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Portland. Keep in mind that there are 8 different airlines that fly to Portland on a routine basis, so you have a few additional options to choose from.

Historically, on average around 33% of flights between Houston and Portland have experienced a delay on any given week. The average delay length over the past 12 months has been 16 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

The number of flights available between Houston and Portland is 4 per day as of May 2026. The most frequent departure time is 8:00PM, with 40% of daily flights leaving in the evening.

The number of flights available between Houston and Portland is 29 per week as of May 2026. The most frequent departure day is Mon, with 24% of weekly flights leaving on this day.