Delta Flight DL4120 Deals & Information (2025/2026)

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Delta Flight 4120 Route Deals From $199

The cheapest prices found with in the last 7 days for return flights were $199 and $199 for one-way flights to Hector Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

What route does flight number DL4120 take?
Flight number DL4120 operates direct from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to Boise Airport. During this journey, expect to be in the air for roughly 1 hour and 25 minutes. Book ahead to lock in your preferred seat.
What kind of plane is on flight number DL4120?
The Embraer 175 is the plane most commonly used for flight DL4120. This flight typically departs from Seattle - Tacoma Intl. Airport (SEA) and touches down at Boise Airport.
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 DL4120 flight with Travelocity, please visit our Customer Service Portal.