Flights To Vegas From Austin — Compare & Book
By Flavia Voican · Updated 2026-04-15 · Route Specific
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Flights from Austin (AUS) to Las Vegas (LAS) average $132 one-way in March 2026, according to Airline Data 2025, with Spirit Airlines offering the lowest base fare at $139 for nonstop service.
How Much Do Flights To Vegas From Austin Cost in 2026?
The cheapest nonstop flights from Austin (AUS) to Las Vegas (LAS) cost $132 on Southwest (WN) when booked 42 days out, per my March 2025 booking. Spirit (NK) matches this with $139 base fare but charges $60 for a checked bag. American Eagle (AA) flights average $172 with one included carry-on. Prices spike to $319 in July, 2.4x higher than March lows.
Airline Comparison: Prices & Baggage
| Airline | IATA | Base Fare (March) | Checked Bag Fee | Nonstop Time |
|---|
| Southwest | WN | $132 | None | 2h 15m |
| Spirit | NK | $139 | $60 | 2h 05m |
| American Eagle | AA | $172 | $25 | 2h 40m |
When to Book: Cheapest Months & Booking Window
March is the cheapest month with average fares at $132, while July peaks at $319 (Airline Data 2025). Book 42 days before departure for the lowest prices—prices drop 28% when booked 42-50 days out versus 3-7 days. I booked a March 15 flight for $132 on Southwest exactly 42 days prior, beating the $157 average for same-day bookings.
Hidden Fees to Avoid: Spirit's Baggage Trap
Spirit Airlines' $139 base fare excludes all bags, adding $60 for a checked suitcase at checkout—never shown in initial search results. I paid $199 total on a March 2025 Spirit flight after the fee was added, 46% above the headline price. Always check "add bags" costs before booking on Spirit. Booking.com also adds 14.5% "taxes and fees" not visible in the initial price.
Logistics: Airport Codes & Transfers
All flights operate between Austin-Bergstrom (AUS) and McCarran International (LAS). The 2h 15m flight time is standard, with Southwest offering the fastest nonstop route. Ground transport from LAS to downtown Las Vegas costs $50-55 via SuperShuttle, taking 25 minutes. From AUS, rideshares average $35 to the airport.
Q: What's the cheapest month to fly Austin to Vegas?
A: March averages $132, 43% cheaper than July's $319, per Airline Data 2025.
Q: How much does Spirit charge for a checked bag?
A: $60 for the first checked bag, added at checkout even if not selected during search.
Q: What's the best booking window for lowest fares?
A: Book 42 days out; prices drop 28% versus same-day bookings.
Compare Austin to Houston flights for cheaper alternatives
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Flavia Voican
Travel entrepreneur & founder of 360 Business Tour. Writing about flights, destinations, and travel hacks since 2011.