S$139 Cheap Flights to Southwest

View S$139 flight on Tue, 5 Aug, 2025Opens in a new window

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Cheap round-trip flights to Southwest

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 5 Aug - Sat, 9 Aug
SFO
San Francisco
DEN
Denver
S$278 Return, found 4 days ago
S$278
Return
found 4 days ago
Select Delta flight, departing Tue, 5 Aug from San Francisco to Denver, returning Sat, 9 Aug, priced at S$278 found 4 days ago
United
Sat, 6 Sep - Sat, 20 Sep
SFO
San Francisco
DEN
Denver
S$291 Return, found 3 days ago
S$291
Return
found 3 days ago
Select United flight, departing Sat, 6 Sep from San Francisco to Denver, returning Sat, 20 Sep, priced at S$291 found 3 days ago
American Airlines
Sat, 6 Sep - Sat, 20 Sep
SFO
San Francisco
DEN
Denver
S$316 Return, found 3 days ago
S$316
Return
found 3 days ago
Select American Airlines flight, departing Sat, 6 Sep from San Francisco to Denver, returning Sat, 20 Sep, priced at S$316 found 3 days ago
Air Canada
Sat, 23 Aug - Sat, 30 Aug
YUL
Montreal
DEN
Denver
S$469 Return, found 1 day ago
S$469
Return
found 1 day ago
Select Air Canada flight, departing Sat, 23 Aug from Montreal to Denver, returning Sat, 30 Aug, priced at S$469 found 1 day ago
Lufthansa
Thu, 4 Dec - Wed, 10 Dec
CDG
Paris
DEN
Denver
S$1,078 Return, found 1 day ago
S$1,078
Return
found 1 day ago
Select Lufthansa flight, departing Thu, 4 Dec from Paris to Denver, returning Wed, 10 Dec, priced at S$1,078 found 1 day ago

Find the cheapest month to fly from Columbus (CMH) to Denver (DEN)

August is typically the cheapest month to fly

From S$132 - S$425 per traveller.

Graph displaying average flight prices per month

Frequently asked questions

How do I find cheap flights to Southwest that have flexible change policies?
By using our convenient "No change fee" filter, that's how. Simply type in your dates and other details, click "Search," then select the box below the "Flexible change policies" subheading (look to the left of your screen). Expedia makes it simple to find cheap, flexible airfares to Southwest.
Which airlines fly to Southwest?
Book a seat with one of these airlines and dynamic Southwest will be all yours to discover:

  • United Airlines - 13,033 flights to or near Southwest each month, including 13,033 flights to Denver Intl. Airport (DEN) per month.
  • Southwest Airlines - 6,339 flights to or near Southwest each month, including 6,339 flights to Denver Intl. Airport (DEN) per month.
  • Frontier Airlines - 1,967 flights to or near Southwest each month, including 1,967 flights to Denver Intl. Airport (DEN) per month.

How can I find cheap tickets to Southwest?
You'll always walk away with an epic deal with Expedia, but our "flexible dates" feature makes it that much easier. Enter your preferred flight date, then check the flexible dates box above to see the cheapest prices for nearby days. S$278 was the best price for a flight to Southwest in the last seven days.
How much is a flight to Southwest?
One-way flights departing from San Francisco (SFO) sold for just S$139 in the last seven days. During this time, the cost of a round-trip fare to Southwest varied between S$278 and S$1,078. If you spot a deal, grab it quickly — these fares don't stick around.
What are the most popular airports to fly into in Southwest?
Jet into Denver Intl. Airport (DEN) and enjoy all that Southwest has to offer. As the region's primary entry point, about 24,249 flights touch down here every month.
When is the cheapest time to fly to Southwest?
If you'd rather spend your money enjoying the best of Southwest rather than on flying there, jet off earlier in the week. The most cost-effective day to travel is normally Tuesday, with Monday a close second. With many folks travelling over the weekend, Saturday often has the highest airfares.
How much is a plane ticket to Southwest?
In the last seven days, fares to Southwest cost between S$278 and S$1,078. Prices usually rise as your travel date nears, so find a cheap flight today.
What months are the cheapest to book a flight to Southwest?
The perfect month to purchase well-priced airfares to Southwest is February. It's worth noting that in the USA, the most expensive time to reserve a ticket is the festive month of December.
Flights to Southwest information
Destination airport
Denver Intl.
Destination airport IATA code
DEN
Destination city name
Denver
Return price
S$277

Trending flights to Southwest

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, 16 Oct - Thu, 23 Oct
SIN
Singapore
DEN
Denver
S$892 Return, found 3 days ago
S$892
Return
found 3 days ago
Select Air Canada flight, departing Thu, 16 Oct from Singapore to Denver, returning Thu, 23 Oct, priced at S$892 found 3 days ago
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