Seattle to San José (Alajuela) (SEA–SJO) — Airlines, Schedules & Connections

SEA Airport Page →
airlines 0/wk
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Flight Schedule 0 flights
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  Flight Airline AC Dep Arr Dur OTP Sched  

No flights match your filters.

No nonstop flights on this route. connecting options below.

✦ 1-STOP
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Seattle to San José (Alajuela)
Connecting service available through multiple hubs.
27 1-stop hubs

While no nonstop service exists between SEA and SJO, connecting options are available through 27 hubs.

Also explore SEA Routes SJO Routes SEA Live Flights SJO Live Flights SEA Delays
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for SEA to SJO.
1-STOP
One-Stop Connections
27
Hubs
~8h
Fastest
~28h
Longest
DAL ~8h 47m CMH ~9h 34m MSP ~9h 54m MSY ~10h 27m YYZ ~14h 47m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
1,737
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.
Reliability

On-Time Performance

What to expect at each end of your journey.
Outbound
SEA → SJO
60%
Moderate delays possible. Allow buffer time.
Departing
60%
Return
SJO → SEA
93%
Generally reliable. Most flights run on time.
Arriving
93%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. SEA delays →
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
0h
San José (Alajuela) is 0 hours the same as Seattle.
SEA: MDT · SJO: CST

When it's 6:00 PM in Seattle, it's 6:00 PM in San José (Alajuela).
Visa & Entry

US passport holders enter Costa Rica visa-free for stays up to 180 days. No advance application is needed. Passport must be valid for at least one day beyond the date of entry. A return or onward ticket is required and airlines will check before boarding. Proof of funds (USD 100 per month of stay) may be requested at immigration.

Verify entry requirements with official sources before travel.
Getting to SEA

Link Light Rail runs from downtown Seattle (Westlake station) to the airport in 38 minutes ($3.50 peak). Trains run every 6–12 minutes during peak hours from 5am to 1am. Ride-shares run $30–50 from downtown; SR-99 and I-5 can be heavily congested southbound during afternoon rush (3–7pm).

Sound Transit 574 express bus serves Tacoma ($2.50–4). Sounder commuter rail connects Tacoma to the airport area via a shuttle.

Facts

SEA–SJO Quick Facts

Key statistics for the Seattle to San José (Alajuela) route.
Route details
Time difference0 hours
Airlines (nonstop)0
1-stop connections27 hubs
Origin: SEA
Full nameSeattle–Tacoma International Airport
IATA / ICAOSEA / KSEA
TimezoneAmerica/Boise
Passengers/yr52.6M
Elevation433 ft / 132 m
Destination: SJO
Full nameJuan Santamaría International Airport
IATA / ICAOSJO / MROC
TimezoneAmerica/Costa_Rica
Passengers/yr7.5M
Elevation3,021 ft / 921 m
FAQ

Frequently Asked Questions

Common questions about SEA to SJO flights.
Yes, 1-stop connections are available through DAL, CMH, MSP, MSY, YYZ, SFO, GDL, LAX, MIA, DFW, IAH, BNA, ORD, DEN, ATL, FLL, CLT, JFK, CDG, EWR, MEX, AMS, MCO, BWI, IAD, FRA and CUN. These options provide additional schedule flexibility.
Yes, return flights from SJO to SEA are available. Use the direction toggle at the top to view the return schedule.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.

Connecting Options and Alternatives

27 one-stop connections are available, with the fastest taking approximately 8 hours via DAL. Two-stop connections are also available via intermediate hubs.