Delta Flight 3603 Deals & Information (2025/2026)

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Delta Flight 3603 Route Deals From $81

The cheapest prices found with in the last 7 days for return flights were $120 and $81 for one-way flights to Boise for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Sep 13 - Tue, Sep 16
SEA
Seattle - Tacoma Intl.
BOI
Boise
$120 Roundtrip, found 3 days ago
$120
Roundtrip
found 3 days ago
Select Delta flight, departing Sat, Sep 13 from Seattle - Tacoma Intl. to Boise, returning Tue, Sep 16, priced at $120 found 3 days ago
Tue, Oct 7 - Mon, Oct 13
SEA
Seattle - Tacoma Intl.
BOI
Boise
$140 Roundtrip, found 7 hours ago
$140
Roundtrip
found 7 hours ago
Select Delta flight, departing Tue, Oct 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Oct 13, priced at $140 found 7 hours ago
Thu, Nov 6 - Mon, Nov 10
SEA
Seattle - Tacoma Intl.
BOI
Boise
$174 Roundtrip, found 1 day ago
$174
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Nov 6 from Seattle - Tacoma Intl. to Boise, returning Mon, Nov 10, priced at $174 found 1 day 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.