Delta Flight AS3603 Deals & Information (2025/2026)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Delta Flight 3603 Route Deals From $70

The cheapest prices found with in the last 7 days for return flights were $180 and $70 for one-way flights to Boise for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Oct 19 - Mon, Oct 20
SEA
Seattle - Tacoma Intl.
BOI
Boise
$180 Roundtrip, found 13 hours ago
$180
Roundtrip
found 13 hours ago
Select Delta flight, departing Sun, Oct 19 from Seattle - Tacoma Intl. to Boise, returning Mon, Oct 20, priced at $180 found 13 hours 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.