Delta Flight 3688 Deals & Information (2025/2026)

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Delta Flight 3688 Route Deals From $79

The cheapest prices found with in the last 7 days for return flights were $137 and $79 for one-way flights to Boise for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Nov 21 - Sun, Nov 23
SEA
Seattle - Tacoma Intl.
BOI
Boise
$137 Roundtrip, found 1 hour ago
$137
Roundtrip
found 1 hour ago
Select Delta flight, departing Fri, Nov 21 from Seattle - Tacoma Intl. to Boise, returning Sun, Nov 23, priced at $137 found 1 hour ago
Wed, Aug 20 - Mon, Aug 25
SEA
Seattle - Tacoma Intl.
BOI
Boise
$154 Roundtrip, found 1 day ago
$154
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Aug 20 from Seattle - Tacoma Intl. to Boise, returning Mon, Aug 25, priced at $154 found 1 day ago
Fri, Oct 3 - Mon, Oct 6
SEA
Seattle - Tacoma Intl.
BOI
Boise
$164 Roundtrip, found 21 hours ago
$164
Roundtrip
found 21 hours ago
Select Delta flight, departing Fri, Oct 3 from Seattle - Tacoma Intl. to Boise, returning Mon, Oct 6, priced at $164 found 21 hours ago