Cheap flights from St. Louis to Portland from $128
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Portland departing on 9/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Delta flights from St. Louis to Portland
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How to get the cheapest flight ticket from St. Louis to Portland
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Portland?
The cheapest month to fly to Portland from St. Louis is in September. Flight prices, which tend to average around $287, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in September, then you should wait until April to fly from St. Louis, when ticket prices are also cheap, with an average price of $316.
What is the cheapest day to depart on your flight to Portland?
The cheapest day to depart on your flight to Portland is on a Tuesday when prices can be found for as low as $324. 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 Saturday, with ticket prices averaging around $575.
What is the cheapest time of day to depart on your flight to Portland?
The cheapest time of day to fly to Portland is in the morning when flights can be purchased for as low as $394. At noon is when there is more demand to fly to Portland, so prices are often more expensive at around $575 per ticket.
What is the cheapest Lambert-St Louis to Portland flight route?
Fly from Lambert-St Louis to Portland for the best Lambert-St Louis - Portland flight prices
How far in advance should I book a flight to Portland?
You are more likely to see cheaper flights to Portland from St. Louis when booking 24 weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $356 when searching 24 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from St. Louis for as low as $306 on momondo.
What cabin class options are available on Lambert-St Louis to Portland flights?
There are 1 cabin classes available to choose from on Lambert-St Louis to Portland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Lambert-St Louis to Portland?
Frontier, American Airlines, and Sun Country Air are the most popular carriers operating from Lambert-St Louis to Portland
What airlines fly to Portland?
Delta, American Airlines and United Airlines are the top three most popular airlines that fly to Portland from St. Louis according to our data. Delta 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.
How many flights depart from St. Louis to Portland on average per week?
The number of flights available between St. Louis and Portland is 3 per week as of June 2025. The most frequent departure day is Mon, with 33% of weekly flights leaving on this day.
When to book flights from St. Louis to Portland
Cheap St. Louis to Portland (STL to PDX) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Portland
How far is Lambert-St Louis to Portland by plane?
Portland is 1718.1 mi away from Lambert-St Louis. Typically, this will take 4h 10m by plane in normal conditions.
When did momondo last update prices for flights from Lambert-St Louis Airport to Portland Airport?
Prices for flights from Lambert-St Louis Airport to Portland Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Portland Airport?
The number of operators available for flights from Lambert-St Louis Airport to Portland Airport is 6 as of June 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Portland Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Portland Airport.
What documentation or ID do you need to fly to Portland Airport?
The travel and health documents you'll need for your trip to Portland Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Portland Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from St. Louis to Portland?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from St. Louis to Portland is Boeing 737-800 Passenger/BBJ2 (winglets) (50.00% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (20.00%), Boeing 737-700 Passenger/BBJ1 (winglets) (20.00%), and Airbus A319 (10.00%).
What is the most popular airline from St. Louis to Portland?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Portland is Delta (35% of total bookings). The next most popular airlines are American Airlines (17%), United Airlines (16%), and Southwest (13%).
Best airlines flying from St. Louis to Portland
Compare and see reviews for airlines that fly from St. Louis to Portland with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $108 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $170 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $215 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $216 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $226 | Free Cancellation | Rating 8.0 4,287 reviews | |||
| PriceFrom $226 | Free Cancellation | Rating 7.4 8,790 reviews |
Southwest Flights From St. Louis to Portland
Southwest is one of the most popular airlines flying from St. Louis to Portland, operating 3 flights/week on average for this route. A good Southwest flight deal for St. Louis to Portland starts from $226 round-trip, up to an average price of $434. Our users have rated Southwest at 8.0/10.
Traveling to a place near Portland?
Book flights to Portland if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from St. Louis to Portland?
Finding the right flight to Portland from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Portland quick and easy, saving you time and money.
Can I find flights from St. Louis to Portland with flexible booking policies on momondo?
Flights from St. Louis to Portland with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from St. Louis to Portland?
Once all potential St. Louis to Portland flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from St. Louis to Portland right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Portland, momondo offers a useful price alert feature which will track prices for flights to Portland from St. Louis and alert you when they change.