$191 Cheap Delta flights Baltimore (BWI) to Helena (HLN)

Use the “Price (lowest to highest)” filter on Expedia to find cheap Delta Air Lines round-trip flights from $381 from BWI to HLN. Affordable one-way tickets from $191 are also on offer.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Delta Air Lines flights to Helena are generally more affordable in the low-season months of December and January. Whether you’re after a round-trip or one-way ticket, you could land a better deal then.

Search for cheap Delta Air Lines flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Helena Regional Airport (HLN) one to three months before your departure date. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and journey, the best day to book a domestic flight is generally Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To see if there’s a direct trip from BWI to HLN with Delta Air Lines or another airline, check the “Nonstop” box when searching for flights.

To find the earliest departure from BWI to HLN with Delta Air Lines, filter your search by “Morning” and “Early Morning.” Booking an early flight usually means you’ll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Delta Air Lines flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Helena land at Helena Regional Airport (HLN). This is the main gateway to this destination.

With a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is a favorite for many passengers flying from BWI to HLN. Also, if you’re a Delta SkyMiles and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be used on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You can usually cancel or modify your flight, although there may be a charge if you made your booking more than 24 hours ago. Want to keep your options open? Use Expedia’s “No cancel fee” or “Changes included” filter to find flights that won’t charge you extra if you need to revise your plans. To make modifications, go to “Trips,” select your flight and click on “Manage Booking” for more information.