Lowest Prices
Find the lowest STL airfares by comparing hundreds of airlines and agencies.
Good to Know: Flights to STL
Useful information for finding cheap flights to Lambert St Louis International and booking your next trip
Cheapest Round Trip Flight
$277
American Airlines• 1 stop • 9h 14mOct 14 – Oct 20
The cheapest round trip flight from Philadelphia International to Lambert St Louis International is currently $277
Cheapest Direct Flight
$235
American Airlines• nonstop• 3h 44mOct 14
The cheapest nonstop flight from Philadelphia International to Lambert St Louis International is currently $235
Fastest Flight
3h 44m
The fastest nonstop flight from Philadelphia International to Lambert St Louis International takes 3h 44m
Best Flight Deals to St Louis
Identify the most efficient round-trip flights to St Louis. We present options balancing cost and convenience for your return journey.
Oct 14 - Oct 20, Economy
Philadelphia → St Louis
9h 14m
4:35 PM - 9:29 PM • 1 stop
Philadelphia → St Louis
7h 38m
5:30 AM - 11:28 AM • 1 stop
American Airlines
Oct 14 - Oct 20, Economy
Philadelphia → St Louis
10h 5m
3:40 PM - 11:05 PM • 1 stop
Philadelphia → St Louis
3h 38m
6:00 AM - 9:18 AM • nonstop
American Airlines
Oct 14 - Oct 20, Economy
Philadelphia → St Louis
9h 14m
4:35 PM - 9:29 PM • 1 stop
Philadelphia → St Louis
3h 38m
6:00 AM - 9:18 AM • nonstop
American Airlines
Oct 14 - Oct 20, Economy
Philadelphia → St Louis
8h 51m
5:06 PM - 9:37 PM • 1 stop
Philadelphia → St Louis
11h 55m
9:20 AM - 5:35 PM • 1 stop
United Airlines
Oct 14 - Oct 20, Economy
Philadelphia → St Louis
7h 26m
5:02 PM - 10:04 PM • 1 stop
Philadelphia → St Louis
17h 35m
8:53 AM - 5:55 PM • 1 stop
Delta Airlines
Need to travel to St Louis soon? View current last-minute flight options to STL for spontaneous or pressing plans.
Oct 14 - Oct 20, Economy
Seattle → St Louis
17h 20m
9:10 AM - 9:50 PM • 1 stop
Seattle → St Louis
16h 50m
4:40 PM - 12:50 AM • 2 stops
Southwest Airlines
Oct 14 - Oct 20, Economy
Seattle → St Louis
10h 44m
10:39 AM - 7:23 PM • 1 stop
Seattle → St Louis
7h 8m
3:57 PM - 6:25 PM • nonstop
American Airlines
Oct 14 - Oct 20, Economy
Seattle → St Louis
8h 45m
9:46 AM - 6:40 PM • 1 stop
Seattle → St Louis
12h 37m
6:50 AM - 12:47 PM • 1 stop
Delta Airlines
Oct 14 - Oct 20, Economy
Seattle → St Louis
12h 1m
9:25 AM - 4:46 PM • 1 stop
Seattle → St Louis
26h 55m
7:52 PM - 12:07 PM • 1 stop
Delta Airlines
Oct 14 - Oct 20, Economy
Seattle → St Louis
12h 12m
9:25 AM - 11:07 PM • 1 stop
Seattle → St Louis
10h 29m
7:30 PM - 11:59 PM • 1 stop
Delta Airlines
Maximize your time in St Louis, not in transit. Discover non-stop direct flights to STL for the quickest, most straightforward journey to the Strip.
Oct 14 - Oct 20, Economy
Philadelphia → St Louis
3h 44m
2:39 PM - 4:03 PM • nonstop
Philadelphia → St Louis
3h 38m
4:45 PM - 8:03 PM • nonstop
American Airlines
Oct 14 - Oct 20, Economy
Philadelphia → St Louis
4h
6:40 PM - 8:20 PM • nonstop
Philadelphia → St Louis
3h 38m
6:00 AM - 9:18 AM • nonstop
American Airlines
Oct 14 - Oct 20, Economy
Philadelphia → St Louis
3h 56m
8:20 AM - 9:56 AM • nonstop
Philadelphia → St Louis
3h 38m
4:45 PM - 8:03 PM • nonstop
American Airlines
Oct 14 - Oct 20, Economy
Philadelphia → St Louis
3h 50m
6:30 PM - 8:00 PM • nonstop
Philadelphia → St Louis
3h 30m
8:15 PM - 11:25 PM • nonstop
Southwest Airlines
Oct 14 - Oct 20, Economy
Philadelphia → St Louis
3h 45m
8:10 AM - 9:35 AM • nonstop
Philadelphia → St Louis
3h 30m
8:15 PM - 11:25 PM • nonstop
Southwest Airlines
Essential Information for Booking Flights from () - AI Insights
What's the cheapest airline to stl?
To find the cheapest airline to Lambert St Louis International, American Airlines (AA), LATAM Airlines (LA), Copa Airlines (CM), and others are currently offering affordable fares. Explore these options to secure your travel.
What's the popular airline to fly to stl?
United Airlines (UA) offers popular options to Lambert St Louis International, with fares often fitting within a reasonable budget for a single traveler. It’s a frequently chosen airline for travel to this airport.
What's the cheapest day of the week to fly to stl?
Tuesday is the cheapest day to fly to Lambert St Louis International Airport.
What's the cheapest month to fly to stl?
April is the least expensive month to fly to Lambert St Louis International Airport.
What is the cheapest airline to fly to Lambert St Louis International Airport?
American Airlines (AA) typically offers the most affordable fares to Lambert St Louis International Airport.
Destination Airport Information
| IATA Code | STL |
| Name | Lambert St Louis International |
| City | St Louis |
| Country | US |
| Latitude | 38.74869918823242 |
| Longitude | -90.37000274658203 |
Popular Airlines
More Flight Options to St Louis, STL
Why Fareleaders for Flights to STL
New Deals Everyday
Never miss a deal on STL flights—we update prices daily to bring you the best airfares.
Best Travel Options
Compare hundreds of STL flights and find the best deals without any added service charges.