Flights from St Louis to San Diego (STL to SAN)

Looking to travel from St Louis to San Diego within your budget? OneTravel makes it simple to find and book affordable flights from St Louis to San Diego with top-rated airlines and flexible travel schedules. Whether you're flying for work, vacation, or to visit family and friends, we help you secure our best fares quickly and easily.

Our advanced search engine lets you compare flights from STL to SAN, giving you access to our deals, last-minute offers, and seasonal deals.

Find our Best St Louis to San Diego Flight Deals

At OneTravel, saving on air travel is effortless. You can search by preferred flight time, airline, number of stops, and price—all in a few clicks. No matter your travel needs, we help travelers find cheap flights from St Louis to San Diego with ease.

Planning ahead? Sign up for fare alerts and get notified when prices drop on your preferred route. Booking last minute? Use our filters to find great deals on flights from STL to SAN even at short notice.

Travel Tips for STL to SAN Flights

• Departure: Most international or domestic flights depart from the primary airport in St Louis.
• Arrival: Flights usually land at the main airport serving San Diego.
• Duration: Flight times vary depending on the distance and number of stops, ranging from a few hours to over 20 hours for international routes.
• Time Zone: Keep the time zone differences in mind when traveling across regions or countries.
• Great Time to Fly: Fare prices may fluctuate based on seasons, holidays, and special events. Traveling mid-week or during off-peak months often costs less.

Baggage Policy Overview

Each airline has its own baggage allowances, but here’s a general idea of what to expect on most flights from St Louis to San Diego:

• Carry-on baggage: Typically includes 1 small bag and 1 personal item (7kg–10kg combined weight allowed)
• Checked baggage: Economy fares usually include one bag (23kg), while higher fare classes may allow two
• Extra or overweight baggage: Charges vary by airline and can be added during booking or at check-in

We recommend checking specific baggage policies directly with your selected airline, as rules and fees can vary by route and ticket type.

Web Check-in Information

Save time at the airport by checking in online before your flight. Most airlines offer:

• Web check-in window: Opens 24–48 hours before scheduled departure
• Online services: Seat selection, meal preferences, baggage add-ons, and digital boarding pass
• Benefits: Avoid long queues and head straight to security if you have no checked baggage

Frequently Asked Questions