The U.S. aircraft register, updated daily
Routes and flights · the DOT's airline reports, August 2025 to July 2026

William P Hobby ⇄ St. Louis Lambert International HOU–STL

Airlines flew 3,111 flights between William P Hobby HOU in Houston, TX and St. Louis Lambert International STL in St Louis, MO in the twelve months to July 2026, both directions together: 337,145 passengers in 504,780 seats, 67% of them filled, and 599,822 pounds of freight. 687 miles, about 97 minutes in the air, on 4 airlines: Southwest Airlines Co. (3,104), Sun Country Airlines d/b/a MN Airlines (5), Delta Air Lines Inc. (1), United Air Lines Inc. (1). Planning to fly it yourself? The weather and winds along this route right now.

3,111
flights, twelve months
HOU-STL: 1,564 · STL-HOU: 1,547
337,145
passengers
67% of seats filled
687
miles
about 97 minutes airborne
4
airlines
4 aircraft types

Flights by month both directions

0761532303061/254/257/2510/251/264/263067/26
By month, as a table
flights
1/25191
2/25216
3/25275
4/25250
5/25258
6/25276
7/25286
8/25261
9/25249
10/25247
11/25264
12/25276
1/26213
2/26215
3/26290
4/26264
5/26264
6/26262
7/26306

Passengers by month

08,61417,22925,84434,4581/254/257/2510/251/264/2631,8217/26
By month, as a table
passengers
1/2521,149
2/2522,096
3/2530,729
4/2527,116
5/2530,663
6/2530,605
7/2531,977
8/2528,661
9/2525,048
10/2528,554
11/2528,673
12/2530,327
1/2622,026
2/2622,301
3/2634,458
4/2625,977
5/2629,368
6/2629,931
7/2631,821

The airlines twelve months, both directions

AirlineFlightsPassengersSeats filledService
Southwest Airlines Co. WN3,104336,89467%scheduled passenger service
Sun Country Airlines d/b/a MN Airlines SY516618%charter passenger service
Delta Air Lines Inc. DL13346%charter passenger service
United Air Lines Inc. UA15231%charter passenger service

The aircraft as the airlines report their types

AircraftFlightsSeats a flightPassengers
Boeing B737 Max 8001,184175132,412
Boeing 737-700/700LR/Max 71,125140118,963
Boeing 737-80080117585,737
Boeing 757-20017233

HOU → STL this direction alone · flown January 2025 to July 2026

1,564 flights of 1,559 scheduled, 173,040 passengers in 254,849 seats, 352,000 pounds of freight. Southwest Airlines Co. 1,561; Sun Country Airlines d/b/a MN Airlines 3.

STL → HOU this direction alone · flown January 2025 to July 2026

1,547 flights of 1,539 scheduled, 164,105 passengers in 249,931 seats, 247,822 pounds of freight. Southwest Airlines Co. 1,543; Sun Country Airlines d/b/a MN Airlines 2; Delta Air Lines Inc. 1; United Air Lines Inc. 1.

Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: William P Hobby HOU and St. Louis Lambert International STL; all routes.