Delta Flight AS3603 Deals & Information (2025/2026)

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Delta Flight 3603 Route Deals From $79

The cheapest prices found with in the last 7 days for return flights were $127 and $79 for one-way flights to Boise for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Oct 3 - Sat, Oct 4
SEA
Seattle - Tacoma Intl.
BOI
Boise
$127 Roundtrip, found 2 days ago
$127
Roundtrip
found 2 days ago
Select Delta flight, departing Fri, Oct 3 from Seattle - Tacoma Intl. to Boise, returning Sat, Oct 4, priced at $127 found 2 days ago
Wed, Aug 20 - Sun, Aug 24
SEA
Seattle - Tacoma Intl.
BOI
Boise
$129 Roundtrip, found 7 hours ago
$129
Roundtrip
found 7 hours ago
Select Delta flight, departing Wed, Aug 20 from Seattle - Tacoma Intl. to Boise, returning Sun, Aug 24, priced at $129 found 7 hours ago
Wed, Aug 20 - Mon, Aug 25
SEA
Seattle - Tacoma Intl.
BOI
Boise
$154 Roundtrip, found 4 days ago
$154
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Aug 20 from Seattle - Tacoma Intl. to Boise, returning Mon, Aug 25, priced at $154 found 4 days ago
Tue, Sep 9 - Thu, Sep 11
SEA
Seattle - Tacoma Intl.
BOI
Boise
$170 Roundtrip, found 2 days ago
$170
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Sep 9 from Seattle - Tacoma Intl. to Boise, returning Thu, Sep 11, priced at $170 found 2 days ago

Frequently asked questions

What route does flight number DL3603 take?
DL3603 is used on multiple routes. Typically, DL3603 flies straight from Hartford, CT Airport (BDL-Bradley Intl.) to Detroit, MI Airport (DTW-Detroit Metropolitan Wayne County). If you have a ticket on this route, you'll be up above the clouds for around 2 hours and 6 minutes.
What kind of plane is on flight number DL3603?
It's possible you'll be setting off on a Bombardier CRJ900 if you've booked a fare from Bradley Intl. Airport (BDL) to Detroit Metropolitan Wayne County Airport (DTW), one of a few routes used for flight DL3603.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your DL3603 flight with Travelocity, please visit our Customer Service Portal.