Delta Flight 3688 Deals & Information (2026/2027)

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Delta Flight 3688 Route Deals From $103

The cheapest prices found with in the last 7 days for return flights were $170 and $103 for one-way flights to Boise for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, May 9 - Mon, May 11
SEA
Seattle - Tacoma Intl.
BOI
Boise
$170 Roundtrip, found 1 day ago
$170
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, May 9 from Seattle - Tacoma Intl. to Boise, returning Mon, May 11, priced at $170 found 1 day ago
Mon, May 4 - Wed, May 6
SEA
Seattle - Tacoma Intl.
BOI
Boise
$197 Roundtrip, found 2 days ago
$197
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, May 4 from Seattle - Tacoma Intl. to Boise, returning Wed, May 6, priced at $197 found 2 days ago
Sun, May 10 - Wed, May 13
SEA
Seattle - Tacoma Intl.
BOI
Boise
$211 Roundtrip, found 15 hours ago
$211
Roundtrip
found 15 hours ago
Select Delta flight, departing Sun, May 10 from Seattle - Tacoma Intl. to Boise, returning Wed, May 13, priced at $211 found 15 hours ago
Sat, May 9 - Mon, May 11
SEA
Seattle - Tacoma Intl.
BOI
Boise
$211 Roundtrip, found 1 day ago
$211
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, May 9 from Seattle - Tacoma Intl. to Boise, returning Mon, May 11, priced at $211 found 1 day ago
Mon, May 4 - Wed, May 6
SEA
Seattle - Tacoma Intl.
BOI
Boise
$217 Roundtrip, found 2 days ago
$217
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, May 4 from Seattle - Tacoma Intl. to Boise, returning Wed, May 6, priced at $217 found 2 days ago
Sat, May 9 - Mon, May 11
SEA
Seattle - Tacoma Intl.
BOI
Boise
$221 Roundtrip, found 1 day ago
$221
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, May 9 from Seattle - Tacoma Intl. to Boise, returning Mon, May 11, priced at $221 found 1 day ago
Sat, May 9 - Mon, May 11
SEA
Seattle - Tacoma Intl.
BOI
Boise
$226 Roundtrip, found 1 day ago
$226
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, May 9 from Seattle - Tacoma Intl. to Boise, returning Mon, May 11, priced at $226 found 1 day ago
Sun, May 10 - Wed, May 13
SEA
Seattle - Tacoma Intl.
BOI
Boise
$231 Roundtrip, found 15 hours ago
$231
Roundtrip
found 15 hours ago
Select Delta flight, departing Sun, May 10 from Seattle - Tacoma Intl. to Boise, returning Wed, May 13, priced at $231 found 15 hours ago