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

  • American Airlines

    American Airlines

  • British Airways

    British Airways

  • Delta

    Delta

  • Finnair

    Finnair

  • Aer Lingus

    Aer Lingus

  • Icelandair

    Icelandair

  • Iberia

    Iberia

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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 $823 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Oct. 1 - Wed, Oct. 15
SEA
Seattle
INV
Inverness
CA $823 Roundtrip, found 14 hours ago
CA $823
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Wed, Oct. 1 from Seattle to Inverness, returning Wed, Oct. 15, priced at CA $823 found 14 hours ago
American Airlines
Wed, Oct. 1 - Wed, Oct. 15
SEA
Seattle
INV
Inverness
CA $827 Roundtrip, found 14 hours ago
CA $827
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Wed, Oct. 1 from Seattle to Inverness, returning Wed, Oct. 15, priced at CA $827 found 14 hours ago
Aer Lingus
Mon, Aug. 11 - Wed, Aug. 27
SEA
Seattle
GLA
Glasgow
CA $838 Roundtrip, found 6 days ago
CA $838
Roundtrip
found 6 days ago
Select Aer Lingus flight, departing Mon, Aug. 11 from Seattle to Glasgow, returning Wed, Aug. 27, priced at CA $838 found 6 days ago
Icelandair
Tue, Jan. 20 - Wed, Feb. 4
SEA
Seattle
GLA
Glasgow
CA $895 Roundtrip, found 1 hour ago
CA $895
Roundtrip
found 1 hour ago
Select Icelandair flight, departing Tue, Jan. 20 from Seattle to Glasgow, returning Wed, Feb. 4, priced at CA $895 found 1 hour ago
British Airways
Wed, Oct. 1 - Wed, Oct. 15
SEA
Seattle
INV
Inverness
CA $940 Roundtrip, found 14 hours ago
CA $940
Roundtrip
found 14 hours ago
Select British Airways flight, departing Wed, Oct. 1 from Seattle to Inverness, returning Wed, Oct. 15, priced at CA $940 found 14 hours ago
Virgin Atlantic
Wed, Oct. 1 - Wed, Oct. 15
SEA
Seattle
INV
Inverness
CA $945 Roundtrip, found 14 hours ago
CA $945
Roundtrip
found 14 hours ago
Select Virgin Atlantic flight, departing Wed, Oct. 1 from Seattle to Inverness, returning Wed, Oct. 15, priced at CA $945 found 14 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.