$132 Cheap Delta flights Boston (BOS) to St. Louis (STL)

Finding cheap one-way Delta Air Lines flights from BOS to STL from $132 on Expedia is simple — just filter by “Price (lowest to highest).” Or check out our budget-friendly round-trip fares from $237 for your next adventure.**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 St. Louis tend to be more affordable in the quieter months of January and February. Whether you’re after a one-way or a return ticket, you could land a better deal then.

To find cheap Delta Air Lines fares from Logan Intl. Airport (BOS) to Lambert-St. Louis Intl. Airport (STL), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact what you pay. Sunday tends to be the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey on a Sunday.**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.

Fill in your dates, click search and use the “Nonstop” filter on Expedia to find any direct flights from BOS to STL with Delta Air Lines or other carriers.

To find the earliest departure from BOS to STL with Delta Air Lines, filter your search by “Early Morning” and “Morning.” Choosing an early flight usually means cancellations are less likely.**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.

Jump on a Delta Air Lines flight from Logan Intl. Airport (BOS) to St. Louis, and you’ll probably arrive at Lambert-St. Louis Intl. Airport (STL). This is the airline’s main hub in this destination.

Delta Air Lines makes traveling from BOS to STL enjoyable with a rewarding loyalty program and an excellent in-flight experience. You also have the chance to earn points with Delta SkyMiles. Be sure to sign up to Expedia’s free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your ticket type, a fee is typically charged if you modify or cancel your flight more than 24 hours after confirmation. To secure plane tickets with more flexibility, select our “Changes included” or “No cancel fee” filter while looking for flights. To learn more about changing or canceling your reservation, head to “Trips,” select your flight and click on “Manage Booking.”