Cheap flights from Cost

View AU$107 flight on Sun, 21 Sep. 2025Opens in a new window

Popular airlines from Cost

  • American Airlines

    American Airlines

  • Delta

    Delta

  • United

    United

  • Alaska Airlines

    Alaska Airlines

  • Southwest Airlines

    Southwest Airlines

  • Spirit Airlines

    Spirit Airlines

  • Frontier Airlines

    Frontier Airlines

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheapest flights from Cost

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.

Alaska Airlines
Sat, 20 Sep. - Sat, 27 Sep.
AUS
Austin
SFO
San Francisco
AU$244 Return, found 1 day ago
AU$244
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 20 Sep. from Austin to San Francisco, returning Sat, 27 Sep., priced at AU$244 found 1 day ago
Delta
Mon, 25 Aug. - Sat, 6 Sep.
SAT
San Antonio
LAX
Los Angeles
AU$244 Return, found 1 day ago
AU$244
Return
found 1 day ago
Select Delta flight, departing Mon, 25 Aug. from San Antonio to Los Angeles, returning Sat, 6 Sep., priced at AU$244 found 1 day ago
Delta
Wed, 19 Nov. - Wed, 3 Dec.
AUS
Austin
LAX
Los Angeles
AU$244 Return, found 1 day ago
AU$244
Return
found 1 day ago
Select Delta flight, departing Wed, 19 Nov. from Austin to Los Angeles, returning Wed, 3 Dec., priced at AU$244 found 1 day ago
American Airlines
Mon, 8 Dec. - Sat, 13 Dec.
AUS
Austin
LAS
Las Vegas
AU$246 Return, found 1 day ago
AU$246
Return
found 1 day ago
Select American Airlines flight, departing Mon, 8 Dec. from Austin to Las Vegas, returning Sat, 13 Dec., priced at AU$246 found 1 day ago
American Airlines
Wed, 27 Aug. - Thu, 4 Sep.
AUS
Austin
DEN
Denver
AU$249 Return, found 1 day ago
AU$249
Return
found 1 day ago
Select American Airlines flight, departing Wed, 27 Aug. from Austin to Denver, returning Thu, 4 Sep., priced at AU$249 found 1 day ago
American Airlines
Thu, 30 Oct. - Thu, 6 Nov.
AUS
Austin
SAN
San Diego
AU$267 Return, found 2 days ago
AU$267
Return
found 2 days ago
Select American Airlines flight, departing Thu, 30 Oct. from Austin to San Diego, returning Thu, 6 Nov., priced at AU$267 found 2 days ago
Delta
Sat, 20 Sep. - Sat, 27 Sep.
AUS
Austin
JFK
New York
AU$275 Return, found 1 day ago
AU$275
Return
found 1 day ago
Select Delta flight, departing Sat, 20 Sep. from Austin to New York, returning Sat, 27 Sep., priced at AU$275 found 1 day ago
American Airlines
Mon, 18 Aug. - Fri, 22 Aug.
AUS
Austin
BOS
Boston
AU$281 Return, found 5 days ago
AU$281
Return
found 5 days ago
Select American Airlines flight, departing Mon, 18 Aug. from Austin to Boston, returning Fri, 22 Aug., priced at AU$281 found 5 days ago
United
Wed, 27 Aug. - Thu, 4 Sep.
AUS
Austin
DEN
Denver
AU$351 Return, found 1 day ago
AU$351
Return
found 1 day ago
Select United flight, departing Wed, 27 Aug. from Austin to Denver, returning Thu, 4 Sep., priced at AU$351 found 1 day ago
Hawaiian Airlines
Wed, 15 Oct. - Sat, 18 Oct.
AUS
Austin
SAN
San Diego
AU$368 Return, found 4 days ago
AU$368
Return
found 4 days ago
Select Hawaiian Airlines flight, departing Wed, 15 Oct. from Austin to San Diego, returning Sat, 18 Oct., priced at AU$368 found 4 days ago

Flights from Cost: Essential Travel Information

Cheapest flight from Cost
AU$244 (roundtrip)
Best airlines to fly from Cost
Delta, American Airlines, Alaska Airlines, United, Hawaiian Airlines
Cheapest month to fly from Cost
September
Cost IATA code
null
Cost Country/State
Texas
Airline ticket deals from Cost
AU$244 - AU$368
*Available to Expedia members.