Cheap flights from Seattle to Treshnish Isles from CA $427

View CA $427 flight on Sun, Aug. 24, 2025Opens in a new window

Popular airlines from Seattle to Treshnish Isles

  • British Airways

    British Airways

  • Virgin Atlantic

    Virgin Atlantic

  • Finnair

    Finnair

  • Aer Lingus

    Aer Lingus

  • Icelandair

    Icelandair

  • Iberia

    Iberia

  • Lufthansa

    Lufthansa

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Cheap flights from Seattle (SEA) to Treshnish Isles (GLA)

Prices were available within the past 7 days and start at CA $427 for one-way flights and CA $838 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Mon, Aug. 11 - Wed, Aug. 27
SEA
Seattle
GLA
Glasgow
CA $838 Roundtrip, found 5 days ago
CA $838
Roundtrip
found 5 days ago
Select Aer Lingus flight, departing Mon, Aug. 11 from Seattle to Glasgow, returning Wed, Aug. 27, priced at CA $838 found 5 days ago
Aer Lingus
Mon, Aug. 18 - Wed, Sep. 3
SEA
Seattle
GLA
Glasgow
CA $849 Roundtrip, found 2 hours ago
CA $849
Roundtrip
found 2 hours ago
Select Aer Lingus flight, departing Mon, Aug. 18 from Seattle to Glasgow, returning Wed, Sep. 3, priced at CA $849 found 2 hours ago
Icelandair
Mon, Aug. 18 - Wed, Sep. 3
SEA
Seattle
GLA
Glasgow
CA $913 Roundtrip, found 2 hours ago
CA $913
Roundtrip
found 2 hours ago
Select Icelandair flight, departing Mon, Aug. 18 from Seattle to Glasgow, returning Wed, Sep. 3, priced at CA $913 found 2 hours ago
American Airlines
Tue, Sep. 30 - Tue, Oct. 7
SEA
Seattle
GLA
Glasgow
CA $968 Roundtrip, found 8 hours ago
CA $968
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Tue, Sep. 30 from Seattle to Glasgow, returning Tue, Oct. 7, priced at CA $968 found 8 hours ago
British Airways
Tue, Sep. 30 - Tue, Oct. 7
SEA
Seattle
GLA
Glasgow
CA $971 Roundtrip, found 8 hours ago
CA $971
Roundtrip
found 8 hours ago
Select British Airways flight, departing Tue, Sep. 30 from Seattle to Glasgow, returning Tue, Oct. 7, priced at CA $971 found 8 hours ago
Delta
Mon, Aug. 18 - Wed, Sep. 3
SEA
Seattle
GLA
Glasgow
CA $995 Roundtrip, found 2 hours ago
CA $995
Roundtrip
found 2 hours ago
Select Delta flight, departing Mon, Aug. 18 from Seattle to Glasgow, returning Wed, Sep. 3, priced at CA $995 found 2 hours ago

Find the cheapest month to fly from Seattle (SEA) to Glasgow (GLA)

January is typically the cheapest month to fly

From CA $709 - CA $1,556 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.