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Southwest offering one-way flights as low as $39 for travel through May 2024

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Southwest Airlines is offering deals on one-way flights across its entire network for travel this fall and winter and even into spring.

Play around with the airline’s Low Fare Calendar to find the cheapest and best dates for your trip.

Deal basics

Airline: Southwest

Routes: All Southwest routes

How to book: Directly through the airline’s website

Travel dates: Nov. 23, 2023, through May 22, 2024

Book by: Thursday at 11:59 p.m. PDT

Blackout dates: Dec. 26 to 27, 2023, and Jan. 2, 2024, on continental U.S. trips; other blackout dates apply to specific locations

Sample flights

While the promotion advertises one-way flights as low as $39, most one-way fares I found are about $69. For example, if you want to visit Washington, D.C., from Boston, there are plenty of flights starting at $69.

Low fare calendar

All Southwest tickets include a carry-on bag and two checked bags, so you won’t have to worry about those extra fees. Your total would be about $138 round-trip.

boston to bwi

If you’re in the Los Angeles area and want to hit the slopes in Colorado this January, one-way flights from Los Angeles International Airport (LAX) to Denver International Airport (DEN) start at $89.

lax to denver

Thanks to the airline’s two-free-checked-bags policy, you’ll have plenty of space to pack your warm winter clothes.

If you want to avoid LAX at all costs, consider taking a cheap flight from Ontario International Airport (ONT), which is only about 38 miles east of Los Angeles. Southwest is offering $39 one-way tickets from Ontario to Las Vegas this winter.

ontario to Las Vegas

There are also plenty of low fares among the Hawaiian Islands if you want to check out multiple destinations on your Hawaii vacation.

low fare calendar

Maximize your purchase

If you have the Southwest Rapid Rewards Priority Credit Card, use it when booking to earn 3 Rapid Rewards points per dollar spent on Southwest purchases.

Or, use a credit card that earns bonus points on airfare purchases, such as:

Bottom line

Book by Thursday night to capitalize on these cheap flight deals from Southwest. Not only are the flights inexpensive, but the airline’s baggage allowance means you won’t find hidden fees for your suitcase.

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