Costa Rica to United States · 3,322 miles (5,347 km)

Guanacaste (LIR) to Seattle (SEA) flights

Alaska Atmos Rewards logo
12,500 milesCheapest economy award, one way, with Alaska Atmos Rewards

An economy award from Guanacaste (LIR) to Seattle (SEA) starts at 12,500 miles one way with Alaska Atmos Rewards on Alaska Airlines, plus taxes and fees from $33.59. Finnair Plus charges the same. One airline flies nonstop from Guanacaste (LIR) to Seattle (SEA): Alaska Airlines. The two airports are 3,322 miles (5,347 km) apart. Alaska Airlines is in oneworld. There are also 24 ways to fly it with one stop, through Houston, Houston and Denver and more.

How many miles LIR to SEA costs

Economy, one way, on the nonstop flights, from the Award Flight Pricer's award charts. Ranges run off-peak to peak; "from" is the floor of a dynamic price.

ProgramEconomyTaxes and fees
Alaska Atmos RewardsOn Alaska Airlines12,500$33.59–89.79
Finnair PlusOn Alaska Airlines12,500$33.59–89.79
American AAdvantageOn Alaska Airlines17,500$33.59–89.79
Iberia ClubOn Alaska Airlines18,000$33.59–89.79
British Airways ClubOn Alaska Airlines20,750$33.59–89.79
Qatar Airways Privilege ClubOn Alaska Airlines20,750$33.59–89.79
JAL Mileage BankOn Alaska Airlines23,000$33.59–89.79
Cathay Pacific Asia MilesOn Alaska Airlines27,000$56.99–113.19
Qantas Frequent FlyerOn Alaska Airlines28,200$33.59–89.79
Starlux (COSMILE)On Alaska Airlines35,000$66.59–122.79

Business and first class prices are in the Award Flight Pricer. Chart prices need award space on your date, so search it before you transfer points.

Compare every program in the Award Flight Pricer

Airlines flying nonstop from LIR to SEA

  • Alaska Airlines logo
    Alaska Airlinesoneworld · bookable with 9 programsWho books it

Book LIR to SEA with points

Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.

LIR to SEA with one stop

24 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.

  • Via Houston (HOU)Southwest Airlines the whole way
    Southwest Airlines logo
    Southwest Airlines logo
  • Via Houston (IAH)United Airlines the whole way
    United Airlines logo
    Alaska Airlines logo
    United Airlines logo
  • Via Denver (DEN)United Airlines and Southwest Airlines the whole way
    United Airlines logo
    Southwest Airlines logo
    Alaska Airlines logo
    Delta Air Lines logo
    Frontier Airlines logo
    +3
  • Via Dallas (DFW)American Airlines the whole way
    American Airlines logo
    American Airlines logo
    Alaska Airlines logo
    Delta Air Lines logo
  • Via Vancouver (YVR)Air Canada the whole way
    WestJet logo
    Air Canada logo
    Air Canada logo
    Alaska Airlines logo
    Delta Air Lines logo
  • Via Los Angeles (LAX)Alaska Airlines and United Airlines the whole way
    Alaska Airlines logo
    United Airlines logo
    American Airlines logo
    Alaska Airlines logo
    Delta Air Lines logo
    +2
  • Via San Francisco (SFO)United Airlines and Alaska Airlines the whole way
    United Airlines logo
    Alaska Airlines logo
    Alaska Airlines logo
    Delta Air Lines logo
    United Airlines logo
  • Via Calgary (YYC)WestJet the whole way
    WestJet logo
    Alaska Airlines logo
    WestJet logo
  • Via Nashville (BNA)Southwest Airlines the whole way
    Southwest Airlines logo
    Alaska Airlines logo
    Delta Air Lines logo
    Southwest Airlines logo
  • Via Atlanta (ATL)Delta Air Lines the whole way
    Delta Air Lines logo
    Alaska Airlines logo
    Delta Air Lines logo
  • Via Minneapolis (MSP)Delta Air Lines and Sun Country Airlines the whole way
    Delta Air Lines logo
    Sun Country Airlines logo
    Alaska Airlines logo
    Delta Air Lines logo
    Sun Country Airlines logo
  • Via Miami (MIA)American Airlines the whole way
    American Airlines logo
    American Airlines logo
    Alaska Airlines logo
    Delta Air Lines logo
  • Via Fort Lauderdale (FLL)JetBlue Airways, then Alaska Airlines and Delta Air Lines
    JetBlue Airways logo
    Alaska Airlines logo
    Delta Air Lines logo
  • Via Chicago (ORD)United Airlines and American Airlines the whole way
    United Airlines logo
    American Airlines logo
    American Airlines logo
    Alaska Airlines logo
    Delta Air Lines logo
    +1
  • Via Charlotte (CLT)American Airlines the whole way
    American Airlines logo
    American Airlines logo
See all 24 in Routes

LIR to SEA: common questions

How many miles does LIR to SEA cost?

In economy it starts at 12,500 miles one way with Alaska Atmos Rewards on Alaska Airlines, plus taxes and fees from $33.59. Next cheapest: Finnair Plus (12,500), American AAdvantage (17,500) and Iberia Club (18,000). These are award chart prices from the Award Flight Pricer. Programs that price dynamically can cost more on busy dates, so check yours before you transfer points. Business and first class prices are in the pricer too.

Which airlines fly nonstop from LIR to SEA?

Alaska Airlines (oneworld) flies nonstop from Guanacaste (LIR) to Seattle (SEA).

How far is Guanacaste from Seattle by plane?

Guanacaste (LIR) and Seattle (SEA) are 3,322 miles (5,347 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 SEA award flights?

9 programs can book at least one of the nonstop airlines: Alaska Atmos Rewards, American AAdvantage, British Airways Club, Cathay Pacific Asia Miles, Finnair Plus, Iberia Club, JAL Mileage Bank, Qantas Frequent Flyer and 1 more. Which flights each can book depends on its partners, so check the airline before you transfer points.

Where can I connect between Guanacaste and Seattle?

The most direct connections are through Houston (HOU), Houston (IAH), Denver (DEN), Dallas (DFW) and Vancouver (YVR). 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.