Guanacaste (LIR) to Denver (DEN) flights
2 airlines fly nonstop from Guanacaste (LIR) to Denver (DEN): Southwest Airlines and United Airlines. The two airports are 2,337 miles (3,761 km) apart. United Airlines is in Star Alliance. There are also 26 ways to fly it with one stop, through Houston, Houston and Dallas and more.
Airlines flying nonstop from LIR to DEN
- Southwest AirlinesNot in an allianceWho books it
- United AirlinesStar Alliance · bookable with 13 programsWho books it
Book LIR to DEN with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Air Canada AeroplanBooks United Airlines
- Air New Zealand AirpointsBooks United Airlines
- ANA Mileage ClubBooks United Airlines
- Avianca LifeMilesBooks United Airlines
- Emirates SkywardsBooks United Airlines
- EVA Air Infinity MileageLandsBooks United Airlines
- JetBlue TrueBlueBooks United Airlines
- Lufthansa Miles & MoreBooks United Airlines
- Singapore Airlines KrisFlyerBooks United Airlines
- TAP Miles&GoBooks United Airlines
- Thai Royal Orchid PlusBooks United Airlines
- Turkish Airlines Miles&SmilesBooks United Airlines
- United MileagePlusBooks United Airlines
LIR to DEN with one stop
26 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Houston (HOU)Southwest Airlines the whole way
- Via Houston (IAH)United Airlines the whole way
- Via Dallas (DFW)American Airlines the whole way
- Via San Jose (SJO)SANSA, then United Airlines and Southwest AirlinesRZ
- Via Nashville (BNA)Southwest Airlines the whole way
- Via Atlanta (ATL)Delta Air Lines the whole way
+1 - Via Miami (MIA)American Airlines the whole way+1
- Via Fort Lauderdale (FLL)JetBlue Airways, then United Airlines, Southwest Airlines and 1 more
- Via Chicago (ORD)United Airlines and American Airlines the whole way
- Via Charlotte (CLT)American Airlines the whole way+1
- Via Minneapolis (MSP)Delta Air Lines and Sun Country Airlines the whole way
+2 - Via Detroit (DTW)Delta Air Lines the whole way+1
- Via Dulles (IAD)United Airlines the whole way
- Via Los Angeles (LAX)United Airlines the whole way
+2 - Via Baltimore (BWI)Southwest Airlines the whole way
LIR to DEN: common questions
Which airlines fly nonstop from LIR to DEN?
Southwest Airlines and United Airlines (Star Alliance) fly nonstop from Guanacaste (LIR) to Denver (DEN).
How far is Guanacaste from Denver by plane?
Guanacaste (LIR) and Denver (DEN) are 2,337 miles (3,761 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book LIR to DEN award flights?
13 programs can book at least one of the nonstop airlines: Air Canada Aeroplan, Air New Zealand Airpoints, ANA Mileage Club, Avianca LifeMiles, Emirates Skywards, EVA Air Infinity MileageLands, JetBlue TrueBlue, Lufthansa Miles & More and 5 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does LIR to DEN cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for LIR to DEN with taxes and fees.
Where can I connect between Guanacaste and Denver?
The most direct connections are through Houston (HOU), Houston (IAH), Dallas (DFW), San Jose (SJO) and Nashville (BNA). On 23 of them the same airline flies both flights, for example Southwest Airlines through Houston.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.