Cheap flights from Blakely Island to San Juan from CA $234

View CA $234 flight on Mon, Aug. 11, 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 $234 for one-way flights and CA $517 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Mon, Sep. 15 - Tue, Sep. 30
SEA
Seattle
SJU
San Juan
CA $517 Roundtrip, found 15 hours ago
CA $517
Roundtrip
found 15 hours ago
Select JetBlue Airways flight, departing Mon, Sep. 15 from Seattle to San Juan, returning Tue, Sep. 30, priced at CA $517 found 15 hours ago
American Airlines
Sun, Oct. 12 - Wed, Oct. 22
SEA
Seattle
SJU
San Juan
CA $519 Roundtrip, found 2 days ago
CA $519
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sun, Oct. 12 from Seattle to San Juan, returning Wed, Oct. 22, priced at CA $519 found 2 days ago
JetBlue Airways
Sat, Oct. 11 - Tue, Oct. 21
SEA
Seattle
SJU
San Juan
CA $519 Roundtrip, found 2 days ago
CA $519
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Sat, Oct. 11 from Seattle to San Juan, returning Tue, Oct. 21, priced at CA $519 found 2 days ago
Delta
Sun, Nov. 9 - Thu, Nov. 20
SEA
Seattle
SJU
San Juan
CA $568 Roundtrip, found 21 hours ago
CA $568
Roundtrip
found 21 hours ago
Select Delta flight, departing Sun, Nov. 9 from Seattle to San Juan, returning Thu, Nov. 20, priced at CA $568 found 21 hours ago
United
Sun, Oct. 12 - Wed, Oct. 22
SEA
Seattle
SJU
San Juan
CA $584 Roundtrip, found 2 days ago
CA $584
Roundtrip
found 2 days ago
Select United flight, departing Sun, Oct. 12 from Seattle to San Juan, returning Wed, Oct. 22, priced at CA $584 found 2 days ago
Alaska Airlines
Mon, Oct. 27 - Tue, Nov. 4
BLI
Bellingham
SJU
San Juan
CA $1,101 Roundtrip, found 3 days ago
CA $1,101
Roundtrip
found 3 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 3 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.