Cheap flights from St. Louis to Pennsylvania from $56
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 Pennsylvania departing on 9/26. 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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How to get the cheapest flight ticket from St. Louis to Pennsylvania
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 Pennsylvania?
The month of August is, on average, the cheapest month to fly to Pennsylvania from St. Louis, with most prices found around $221. If you don’t want to visit Pennsylvania in August, then you should wait until July to fly from St. Louis, when ticket prices are also cheap, with an average price of $226.
What is the cheapest day to depart on your flight to Pennsylvania?
The cheapest day to depart on your flight to Pennsylvania is on a Thursday when prices can be found for as low as $617. 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 Sunday because tickets tend to average around $817. These prices are subject to change though, so be sure to set up a Price Alert for flights to Pennsylvania.
What is the cheapest time of day to depart on your flight to Pennsylvania?
Our most recent data shows that the best time of day to fly to Pennsylvania is in the evening. Flights from St. Louis to Pennsylvania during this time can be as low as $356. In contrast, the most expensive time of day to depart to Pennsylvania is at noon when prices are around $1,137.
What is the cheapest Lambert-St Louis to Pennsylvania flight route?
Fly from Lambert-St Louis to Philadelphia for the best Lambert-St Louis - Pennsylvania flight prices
How far in advance should I book a flight to Pennsylvania?
You are more likely to see cheaper flights to Pennsylvania from St. Louis when booking 2 weeks ahead of your departure date. In general, you can expect to find flights to Pennsylvania for around $350 when searching 2 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Pennsylvania from St. Louis for as low as $265 on momondo.
What cabin class options are available on Lambert-St Louis to Pennsylvania flights?
There are 4 cabin classes available to choose from on Lambert-St Louis to Pennsylvania 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 Pennsylvania?
Spirit Airlines, American Airlines, and Frontier are the most popular carriers operating from Lambert-St Louis to Pennsylvania
What airlines fly to Pennsylvania?
American Airlines, Southwest and Frontier are the top three most popular airlines that fly to Pennsylvania from St. Louis according to our data. American Airlines is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Pennsylvania. Keep in mind that there are 5 different airlines that fly to Pennsylvania on a routine basis, so you have a few additional options to choose from.
How many flights depart from St. Louis to Pennsylvania on average per day?
The number of flights available between St. Louis and Pennsylvania is 41 per day as of June 2025. The most frequent departure time is 1:00PM, with 61% of daily flights leaving in the afternoon.
How many flights depart from St. Louis to Pennsylvania on average per week?
As of June 2025, 289 flights take off from St. Louis and land in Pennsylvania each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.
Cheap St. Louis to Pennsylvania flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Pennsylvania
Best Price Found | $56 |
|---|---|
Fastest flight time | 1h 35m |
Direct flights | Every day |
Airports in Pennsylvania | 6 airports |
When did momondo last update prices for flights from Lambert-St Louis Airport to Pennsylvania?
Prices for flights from Lambert-St Louis Airport to Pennsylvania refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Pennsylvania?
There are 6 operators available for flights from Lambert-St Louis Airport to Pennsylvania as of June 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Pennsylvania?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Pennsylvania.
What documentation or ID do you need to fly to Pennsylvania?
The travel and health documents you'll need for your trip to Pennsylvania 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 Pennsylvania. 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 Pennsylvania?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from St. Louis to Pennsylvania is Airbus A319 (25.70% of total bookings). The next most popular plane models are Boeing 737-700 Passenger/BBJ1 (winglets) (20.09%), Boeing 737-800 Passenger/BBJ2 (winglets) (17.87%), and Boeing 737 MAX 8 (14.33%).
Best airlines flying from St. Louis to Pennsylvania
Compare and see reviews for airlines that fly from St. Louis to Pennsylvania with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $48 | Free Cancellation | Rating 5.9 3,296 reviews | |||
| PriceFrom $130 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom $131 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $196 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $273 | Free Cancellation | Rating 8.0 4,278 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Pennsylvania?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Pennsylvania. momondo saves you time and could save you money on your trip.
Can I find flights from St. Louis to Pennsylvania with flexible booking policies on momondo?
Yes. All flights to Pennsylvania from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from St. Louis to Pennsylvania?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Pennsylvania from St. Louis.
I’m not ready to book a flight from St. Louis to Pennsylvania right now. Can momondo alert me if prices change?
Yes. momondo can track prices for St. Louis to Pennsylvania flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.