Delta Flight 3507 Deals & Information (2025/2026)

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

Change your flight without a fee on select flights

Delta Flight 3507 Route Deals From $209

The cheapest prices found with in the last 7 days for return flights were $302 and $209 for one-way flights to Eppley Field for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

What route does flight number DL3507 take?
DL3507 serves multiple routes, but the most common is between Ontario Airport and SEA. If your flight is direct, you'll step off the plane in about 2 hours and 49 minutes. Multi-stop flights can also operate under this number, as can services on other routes.
What terminal does DL3507 fly out of?
DL3507 flights from Los Angeles - Ontario Intl. Airport (ONT) normally depart from Terminal 2. This flight number runs on several different routes, but the most frequented one is Los Angeles - Ontario Intl. Airport (ONT) to Sea-Tac Airport.
What kind of plane is on flight number DL3507?
DL3507 is a flight number that is used on many routes. If you have a ticket on the most popular one, ONT to Sea-Tac Airport, you're likely to be hopping on board an Embraer 175.
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 DL3507 flight with Travelocity, please visit our Customer Service Portal.