Cheap Flights to Southwest , CO from CA $150

View CA $150 flight on Tue, Jun 9, 2026Opens in a new window

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How much is the cheapest flight to Southwest?

Prices were available within the past 7 days and start at CA $150 for one-way flights and CA $298 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Jun 6 - Tue, Jun 9
SEA
Seattle
DEN
Denver
CA $298 Roundtrip, found 8 hours ago
CA $298
Roundtrip
found 8 hours ago
Select Delta flight, departing Sat, Jun 6 from Seattle to Denver, returning Tue, Jun 9, priced at CA $298 found 8 hours ago
Alaska Airlines
Sat, Jun 6 - Sun, Jun 7
SEA
Seattle
DEN
Denver
CA $312 Roundtrip, found 8 hours ago
CA $312
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Sat, Jun 6 from Seattle to Denver, returning Sun, Jun 7, priced at CA $312 found 8 hours ago
Air Canada
Thu, Jun 18 - Tue, Jun 23
YYC
Calgary
DEN
Denver
CA $356 Roundtrip, found 2 hours ago
CA $356
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Thu, Jun 18 from Calgary to Denver, returning Tue, Jun 23, priced at CA $356 found 2 hours ago
United
Sun, Jun 7 - Wed, Jun 24
YYC
Calgary
DEN
Denver
CA $373 Roundtrip, found 3 hours ago
CA $373
Roundtrip
found 3 hours ago
Select United flight, departing Sun, Jun 7 from Calgary to Denver, returning Wed, Jun 24, priced at CA $373 found 3 hours ago
WestJet
Thu, Oct 15 - Sun, Oct 18
YYC
Calgary
DEN
Denver
CA $378 Roundtrip, found 1 day ago
CA $378
Roundtrip
found 1 day ago
Select WestJet flight, departing Thu, Oct 15 from Calgary to Denver, returning Sun, Oct 18, priced at CA $378 found 1 day ago

Frequently asked questions

How do I find cheap flights to Southwest that have flexible change policies?
It's as easy as 1-2-3 with Expedia. Firstly, enter your travel dates and click on the "Search" button. Next step? Check "No change fee" directly below the "Flexible change policies" heading to the left of the screen. Step 3. Book your cheap and flexible airfare to Southwest.
Which airlines fly to Southwest?
Reserve your seat with one of these airlines and the dynamic region of Southwest will be yours to explore:

  • United Airlines - 13,845 flights to or near Southwest each month, including 13,845 flights to Denver Intl. Airport (DEN) per month.
  • Southwest Airlines - 6,699 flights to or near Southwest each month, including 6,699 flights to Denver Intl. Airport (DEN) per month.
  • Frontier Airlines - 1,547 flights to or near Southwest each month, including 1,547 flights to Denver Intl. Airport (DEN) per month.

How can I find cheap tickets to Southwest?
Start searching as early as possible, consider nearby airports, use points or miles — there are loads of ways! Another one is to take advantage of Expedia's "flexible dates" function. Search for a Southwest flight, then check out the prices for nearby dates. In the last seven days, the lowest price for a flight to Southwest was CA $298.
How much is a flight to Southwest?
There were lots of low-cost fares for the taking in the last seven days, with the price of a return ticket to Southwest ranging between CA $298 and CA $378. Many lucky travellers scored one-way seats from Seattle (SEA) for just CA $150.
What are the most popular airports to fly into in Southwest?
The main entryway to Southwest, around 24,420 flights land at Denver Intl. Airport (DEN) every month. Look for an unbeatable deal, lock in your fare and prepare to discover this amazing region.
When is the cheapest time to fly to Southwest?
Flying on a Tuesday, followed by a Monday, is generally the best way to nab the cheapest flight. Stay away from the weekends if you can, because Saturday is typically the costliest day. Spend the dollars you saved having a blast in Southwest instead!
How much is a plane ticket to Southwest?
Ticket prices to Southwest ranged from CA $298 to CA $378 in the last seven days. Usually, the sooner you make a reservation, the better the price.
What months are the cheapest to book a flight to Southwest?
A cheap month to bag a fantastic deal to Southwest is February, while prices rise considerably in December. Give this month a miss if you're watching your pennies.

Book with confidence

Expedia.ca gives you the best tools to secure great deals on flights to Southwest. Use our easy and convenient booking engine to browse nonstop flights and convenient departure points every day of the year. Search airfares from the top airlines to book your perfect flight to Southwest. Whatever your travel needs, you can always rely on Expedia.ca to help you find cheap flights to Southwest.

Using our booking engine is simple - just type in your points of travel and preferred dates and Expedia.ca does the rest! If your travel times are flexible, you can find even better bargains by adjusting your flight dates. Browse connecting flights to increase your chances of finding even lower fares. Thanks to Expedia's Best Price Guarantee, you can book your Southwest flights with full confidence knowing that you've found the best deal online.

Expedia.ca makes the booking process easy and stress-free by offering support along the entire way. Our friendly staff is available 24 hours a day to provide assistance and help you book your ticket. Call us toll-free at 1-888-397-3342 to answer any questions that you may have about your trip to Southwest.

Looking to save even more? Get additional savings by bundling your Southwest flight with a hotel and/or car rental to create a bargain travel package. Early birds can discover terrific savings by booking in advance while last minute travelers can enjoy great last minute deals. With Expedia.ca, there's no shortage of options to save even more on your Southwest trip!

Travel information

Destination airport
Denver Intl.
Destination airport IATA code
DEN
Destination city name
Denver
Roundtrip price
CA $297

Trending flights to Southwest

Prices were available within the past 7 days and start at CA $150 for one-way flights and CA $298 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Oct 20 - Tue, Oct 20
YYC
Calgary
DEN
Denver
CA $330 Roundtrip, found 11 hours ago
CA $330
Roundtrip
found 11 hours ago
Select Delta flight, departing Tue, Oct 20 from Calgary to Denver, returning Tue, Oct 20, priced at CA $330 found 11 hours ago

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