Cheap flights from Blakely Island to San Juan from CA $256

View CA $256 flight on Sat, Nov. 8, 2025Opens in a new window

Popular airlines from Blakely Island to San Juan

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Cheap flights from Blakely Island (SEA) to San Juan (SJU)

Prices were available within the past 7 days and start at CA $256 for one-way flights and CA $507 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Oct. 14 - Wed, Oct. 15
SEA
Seattle
SJU
San Juan
CA $507 Roundtrip, found 20 hours ago
CA $507
Roundtrip
found 20 hours ago
Select Delta flight, departing Tue, Oct. 14 from Seattle to San Juan, returning Wed, Oct. 15, priced at CA $507 found 20 hours ago
American Airlines
Sat, Nov. 8 - Mon, Nov. 17
SEA
Seattle
SJU
San Juan
CA $513 Roundtrip, found 4 hours ago
CA $513
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Sat, Nov. 8 from Seattle to San Juan, returning Mon, Nov. 17, priced at CA $513 found 4 hours ago
JetBlue Airways
Sat, Oct. 11 - Sat, Oct. 18
SEA
Seattle
SJU
San Juan
CA $515 Roundtrip, found 20 hours ago
CA $515
Roundtrip
found 20 hours ago
Select JetBlue Airways flight, departing Sat, Oct. 11 from Seattle to San Juan, returning Sat, Oct. 18, priced at CA $515 found 20 hours ago
Delta
Sat, Nov. 8 - Mon, Nov. 17
SEA
Seattle
SJU
San Juan
CA $516 Roundtrip, found 4 hours ago
CA $516
Roundtrip
found 4 hours ago
Select Delta flight, departing Sat, Nov. 8 from Seattle to San Juan, returning Mon, Nov. 17, priced at CA $516 found 4 hours ago
United
Sat, Oct. 11 - Sat, Oct. 18
SEA
Seattle
SJU
San Juan
CA $577 Roundtrip, found 20 hours ago
CA $577
Roundtrip
found 20 hours ago
Select United flight, departing Sat, Oct. 11 from Seattle to San Juan, returning Sat, Oct. 18, priced at CA $577 found 20 hours ago
Alaska Airlines
Mon, Oct. 27 - Tue, Nov. 4
BLI
Bellingham
SJU
San Juan
CA $1,101 Roundtrip, found 4 days ago
CA $1,101
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, Oct. 27 from Bellingham to San Juan, returning Tue, Nov. 4, priced at CA $1,101 found 4 days ago

Find the cheapest month to fly from Seattle (SEA) to San Juan (SJU)

October is typically the cheapest month to fly

From CA $312 - CA $568 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.