$123 Cheap Delta flights Billings (BIL) to San Diego (SAN)

Scoring cheap one-way Delta Air Lines flights from BIL to SAN from $123 on Expedia is a breeze — just filter by “Price (lowest to highest).” Or check out our budget-friendly return fares from $245 for your next getaway.**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 San Diego are often more affordable in the quieter months of January and November. Whether you’re in search of a round-trip or one-way ticket, you could score a better deal then.

For cheap Delta Air Lines fares from Logan Intl. Airport (BIL) to San Diego Intl. Airport (SAN), start searching one to three months before your planned departure. Securing 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 the overall price. Sunday is usually the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking 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.

Use the “Nonstop” filter when looking for direct Delta Air Lines flights from BIL to SAN. It’s also a great way to compare other airlines offering the same nonstop journey.

Search Delta Air Lines’s earliest flights from BIL to SAN by checking our “Morning” and “Early Morning” filters. Not only will you get to where you’re going sooner, early departures also have a 20% less chance of being canceled.**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.

Board a Delta Air Lines flight from Logan Intl. Airport (BIL) to San Diego, and you’ll probably arrive at San Diego Intl. Airport (SAN). This is the airline’s primary hub here.

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

Typically, you can change or cancel your flight, although additional fees may apply if you made your booking more than 24 hours ago. Prefer to keep your options open? Make use of our “Changes included” or “No cancel fee” filter to find flights that won’t charge extra if you need to adjust your plans. To update your itinerary, visit “Trips,” select your flight and click on “Manage Booking” for more information.