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

Denver International ⇄ Liberia DEN–LIR

Airlines flew 675 flights between Denver International DEN in Denver, CO and Liberia, Costa Rica LIR in Liberia, CR in the twelve months to July 2026, both directions together: 100,351 passengers in 115,110 seats, 87% of them filled. 2,332 miles, about 277 minutes in the air, on 2 airlines: United Air Lines Inc. (587), Southwest Airlines Co. (88).

675
flights, twelve months
DEN-LIR: 338 · LIR-DEN: 337
100,351
passengers
87% of seats filled
2,332
miles
about 277 minutes airborne
2
airlines
5 aircraft types

Flights by month both directions

0204162821/254/257/2510/251/264/26687/26
By month, as a table
flights
1/2570
2/2564
3/2582
4/2570
5/2558
6/2575
7/2578
8/2540
9/252
10/2520
11/2568
12/2569
1/2670
2/2662
3/2678
4/2670
5/2660
6/2668
7/2668

Passengers by month

03,2596,5189,77813,0371/254/257/2510/251/264/2610,1537/26
By month, as a table
passengers
1/2511,389
2/2510,485
3/2513,037
4/2510,076
5/258,479
6/2510,737
7/259,989
8/255,032
9/25222
10/252,038
11/259,109
12/2510,475
1/2611,119
2/2610,309
3/2612,925
4/269,991
5/268,634
6/2610,344
7/2610,153

The airlines twelve months, both directions

AirlineFlightsPassengersSeats filledService
United Air Lines Inc. UA58788,59088%scheduled passenger service
Southwest Airlines Co. WN8811,76179%scheduled passenger service

The aircraft as the airlines report their types

AircraftFlightsSeats a flightPassengers
Boeing B737 Max 80042216760,022
Boeing B737 Max 90021917936,167
Boeing 737-700/700LR/Max 7171401,833
Boeing 737-800161752,173
Boeing 737-900ER1179156

DEN → LIR this direction alone · flown January 2025 to July 2026

338 flights of 339 scheduled, 49,561 passengers in 58,038 seats. United Air Lines Inc. 294; Southwest Airlines Co. 44.

LIR → DEN this direction alone · flown January 2025 to July 2026

337 flights of 339 scheduled, 50,790 passengers in 57,072 seats. United Air Lines Inc. 293; Southwest Airlines Co. 44.

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: Denver International DEN and Liberia, Costa Rica LIR; all routes.