Dulles (IAD) to Guanacaste (LIR) flights
One airline flies nonstop from Dulles (IAD) to Guanacaste (LIR): United Airlines. The two airports are 2,021 miles (3,253 km) apart. United Airlines is in Star Alliance. There are also 19 ways to fly it with one stop, through Miami, Fort Lauderdale and Charlotte and more.
Airlines flying nonstop from IAD to LIR
- United AirlinesStar Alliance · bookable with 13 programsWho books it
Book IAD to LIR 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
IAD to LIR with one stop
19 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Miami (MIA)American Airlines the whole way
- Via Fort Lauderdale (FLL)United Airlines and Frontier Airlines, then JetBlue Airways
- Via Charlotte (CLT)American Airlines the whole way
- Via Atlanta (ATL)Delta Air Lines the whole way
- Via San Jose (SJO)United Airlines, then SANSA and Edelweiss AirRZ
- Via Philadelphia (PHL)United Airlines, then American Airlines
- Via Nashville (BNA)United Airlines, then Southwest Airlines
- Via New York (EWR)United Airlines the whole way
- Via New York (JFK)Delta Air Lines the whole way
- Via Detroit (DTW)Delta Air Lines the whole way
- Via Toronto (YYZ)Air Canada the whole way
+1
- Via Houston (IAH)United Airlines the whole way
- Via Chicago (ORD)United Airlines the whole way
- Via Boston (BOS)United Airlines, then JetBlue Airways and Delta Air Lines
- Via Dallas (DFW)American Airlines the whole way
IAD to LIR: common questions
Which airlines fly nonstop from IAD to LIR?
United Airlines (Star Alliance) flies nonstop from Dulles (IAD) to Guanacaste (LIR).
How far is Dulles from Guanacaste by plane?
Dulles (IAD) and Guanacaste (LIR) are 2,021 miles (3,253 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book IAD to LIR 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 IAD to LIR cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for IAD to LIR with taxes and fees.
Where can I connect between Dulles and Guanacaste?
The most direct connections are through Miami (MIA), Fort Lauderdale (FLL), Charlotte (CLT), Atlanta (ATL) and San Jose (SJO). On 13 of them the same airline flies both flights, for example American Airlines through Miami.
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.