Cheap Southwest Airlines Flights St Louis (STL) to Ontario (ONT)

Book Southwest Airlines St Louis to Ontario Flight Tickets

JetSaver brings you the best cheap flight fares of Southwest Airlines St Louis to Ontario and not only best deals but also all the flight details you need. This includes schedules, Southwest Airlines baggage rules, seat selection, flight tickets, and other important information to make your travel planning easier. Book Southwest Airlines St Louis to Ontario Flights with JetSaver, Enjoy special deals on your flight booking. Save money with the Southwest Airlines lowest ticket prices from STL to ONT.

Southwest Airlines St Louis to Ontario Flight Deals

Traveling from St Louis to Ontario is now so easy with Southwest Airlines flights. There are plenty of flights that connect St Louis to Ontario, with a regular and convenient schedule that includes both direct and connecting flights. But travelers can get Southwest Airlines flight tickets at the lowest prices and can have a safe and comfortable trip throughout their journey. Use JetSaver to get the lowest Southwest Airlines flight tickets from St Louis to Ontario for both business and vacation purposes.

Get the most affordable discounts on Southwest Airlines flights by using JetSaver to search for the lowest possible ticket prices. Choose Southwest Airlines flights by comparing flight fares using JetSaver. Don’t miss out, on Southwest Airlines deal fares from St Louis to Ontario and book your flight today for a great experience. You can also search for return journey tickets with JetSaver

You Can Score $49 One-way Flights With This Airline's Sale

Southwest Airlines is offering a spring sale with one-way fares starting at $49. To take advantage, bookings must be made by March 13 at 11:59 p.m. PT with a 21-day advance purchase. Travel within the continental U.S. is available from March 31 to June 11 (Mondays through Thursdays), excluding Memorial Day (May 26). Flights to and from Hawaii and San Juan, Puerto Rico are available from April 28 to May 21 with specific day restrictions. The sale applies to Wanna Get Away fares, and while non-refundable, cancellations made at least 10 minutes before departure qualify for a credit.

Southwest's Companion Pass Deal: Act Fast to Bring a Friend Free!

Southwest Airlines is keeping the love alive with a special "bring a friend for free" promotion. Travelers who register on the airline's website and book a round-trip or two one-way flights by February 20, 2025, can earn a limited-time Companion Pass. The flights must be completed by March 31, 2025, and the pass will be valid from August 7 to October 8, 2025. The offer applies to bookings made with cash, Rapid Rewards points, or the new Cash + Points option. While the companion fare is free, taxes and fees still apply. This promotion falls during the industry's off-peak season, making it a great opportunity for budget-friendly travel.

Southwest Airlines Flights from St Louis (STL) to Ontario (ONT) 

Looking to book a flight from St Louis to Ontario Southwest Airlines? Southwest Airlines offers affordable, convenient service on St Louis to Ontario. Finding the cheapest flight ticket from St Louis (STL) to Ontario (ONT) with Southwest Airlines can help you travel smart without breaking the bank. To make flight booking effortless, use JetSaver—a smart flight fare comparison tool that finds the lowest prices across hundreds of travel agencies, and airline websites.

Southwest Airlines St Louis to Ontario Flights

You will enjoy budget-friendly pricing, flexible options and a reliable travel experience while flying with Southwest Airlines. The airline's presence on this route(STL and ONT) makes it a top pick for travelers searching for low fares and on-time service. To ensure you're getting the best available deal, compare and book these flights directly on JetSaver

Why Choose Southwest Airlines for your Ontario Adventure?

• Reasonably priced tickets without compromising on quality
• Frequent flights for easy scheduling
• Add-ons that are optional so you only pay for what you need
• Reward programs and fare discounts for loyal customers
• Streamlined online booking and check-in options

With its real-time price comparisons, JetSaver help passengers in finding and booking these cheap flights from Southwest Airlines and other carriers, allowing them to make quick decisions

Tips to get Cheap Southwest Airlines Tickets from St Louis to Ontario

• Book early to grab the lowest fares
• For more affordable costs travel in the middle of the week
• Sign up for airline alerts for exclusive offers
• Avoid peak season if your dates are flexible

Southwest Airlines Baggage Allowance & Fees

Each person traveling with Southwest Airlines is allowed to check two free baggage, each of which may weigh up to 50 pounds and have a maximum size of 62 inches. You can carry one personal item and one regular bag depending on size limitations which are allowed in carry-on luggage.

Southwest Airlines Check-in Information

Web check-in

Web check-in is available on Southwest Airlines' website and mobile app. Online check-in can be done from 24 hours to 90 minutes before the departure time of your scheduled flight.

Airport check-in

For fast check-in, many airports provide curbside check-in or self-service kiosks. For domestic flights, arrive at least 45 minutes in advance, and for international flights, arrive at least 60 minutes in advance.