Cheap flights from Portland to St. Louis from $81
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to St. Louis departing on 3/13. 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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Frontier flights from Portland to St. Louis
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United Airlines flights from Portland to St. Louis
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How to get the cheapest flight ticket from Portland to St. Louis
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 St. Louis?
In general, January is the cheapest month to fly from Portland to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $280. The month of September is another great option to travel to St. Louis, with average flight prices from Portland averaging around $318.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Friday when prices can be found for as low as $366. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around $431. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Portland in the evening is the least expensive time of day to depart. momondo users have found prices as low as $288 when looking at flights departing in the evening. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $416 per ticket.
What is the cheapest Portland to Lambert-St Louis flight route?
Fly from Portland to Lambert-St Louis for the best Portland - Lambert-St Louis flight prices
How far in advance should I book a flight to St. Louis?
You are more likely to see cheaper flights to St. Louis from Portland when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $394 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Portland for as low as $326 on momondo.
What cabin class options are available on Portland to Lambert-St Louis flights?
There are 1 cabin classes available to choose from on Portland to Lambert-St Louis 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 Portland to Lambert-St Louis?
Frontier, American Airlines, and Spirit Airlines are the most popular carriers operating from Portland to Lambert-St Louis
What airlines fly to St. Louis?
Delta, United Airlines and American Airlines are the top three most popular airlines that fly to St. Louis from Portland 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 St. Louis. Keep in mind that there are 6 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
How many flights depart from Portland to St. Louis on average per day?
1 flights are operational daily from Portland to St. Louis as of February 2025. The most popular departure time for this route is 7:00AM, with 100% of flights per day taking off at noon.
How many flights depart from Portland to St. Louis on average per week?
The number of flights available between Portland and St. Louis is 7 per week as of February 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.
When to book flights from Portland to St. Louis
Cheap Portland to St. Louis (PDX to STL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Portland to St. Louis
How far is Portland to Lambert-St Louis by plane?
A flight from Portland to Lambert-St Louis will travel around 1718.1 mi. A reasonable flight in good conditions will take 3h 40m.
When did momondo last update prices for flights from Portland Airport to Lambert-St Louis Airport?
Prices for flights from Portland Airport to Lambert-St Louis Airport are updated daily.
How many operators does momondo search for flights from Portland Airport to Lambert-St Louis Airport?
As of February 2025, there are 6 operators available to choose from for flights from Portland Airport to Lambert-St Louis Airport.
How old do you have to be to fly from Portland Airport to Lambert-St Louis 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 Portland Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Portland to St. Louis?
momondo data reveals that the most frequently booked plane model on the route from Portland to St. Louis is Boeing 737-900, representing 30.00% of all bookings. The subsequent popular models are Airbus A320-100/200 at 30.00%, Boeing 737 MAX 8 at 20.00%, and Airbus A321neo at 10.00%.
What is the most popular airline from Portland to St. Louis?
momondo data reveals that the most frequently booked airline on the route from Portland to St. Louis is Delta, representing 35% of all bookings. The subsequent popular airlines are United Airlines at 19%, American Airlines at 17%, and Frontier at 14%.
Best airlines flying from Portland to St. Louis
Compare and see reviews for airlines that fly from Portland to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $111 | Free Cancellation | Rating 6.0 3,354 reviews | |||
| PriceFrom $198 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $216 | Free Cancellation | Rating 8.0 8,212 reviews | |||
| PriceFrom $228 | Free Cancellation | Rating 8.0 9,700 reviews | |||
| PriceFrom $254 | Free Cancellation | Rating 7.4 8,759 reviews | |||
| PriceFrom $355 | Free Cancellation | Rating 8.1 4,401 reviews |
United Airlines Flights From Portland to St. Louis
United Airlines is one of the most popular airlines flying from Portland to St. Louis, operating 7 flights/week on average for this route. A good United Airlines flight deal for Portland to St. Louis starts from $254 round-trip, up to an average price of $453. Our users have rated United Airlines at 7.4/10.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Portland to St. Louis?
It is quick and easy to find Portland to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.
Can I find flights from Portland to St. Louis with flexible booking policies on momondo?
momondo does allow users to show only those flights to St. Louis from Portland which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Portland to St. Louis?
Once you have performed a search for Portland to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Portland to St. Louis right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Portland to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.