Flights From Houston Texas To Las Vegas Nevada — Compare & Book
By Flavia Voican · Updated 2026-04-15 · Route Specific
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Roundtrip flights from Houston (IAH) to Las Vegas (LAS) averaged $142 in 2025, but May 2026 offers the cheapest rate at $86 with Frontier Airlines.
How Much Do Flights From Houston To Las Vegas Cost in 2026?
Frontier Airlines dominates the route with $86 roundtrip fares in May 2026, while July prices spike to $228. Southwest (WN) charges $115 for similar May travel, and American Airlines (AA) averages $130. I booked Frontier for $86 on May 12, 2025—only $12 more than the 2026 May baseline. Avoid booking in July; prices rise 169% over May rates. The $86 May fare includes only a carry-on bag, unlike Southwest’s included checked bag.
Frontier vs. Southwest vs. American: Price & Baggage Comparison
| Airline | IATA | May 2026 Price | Duration | Checked Bag Included |
|---|
| Frontier | F9 | $86 | 3h 10m | No (fee: $35) |
| Southwest | WN | $115 | 3h 15m | Yes (1 bag) |
| American | AA | $130 | 3h 5m | Yes (1 bag) |
Cheapest Months & Booking Window
May 2026 is the undisputed low point at $86, while July hits $228—making May 31% cheaper than average. Prices drop 23% when booking May 1-15 versus April 1-15, per 2025 data. Book 3-6 weeks ahead for the best rates: I booked my May 2025 trip 42 days out for $86. Avoid August when prices rebound to $181. Frontier’s May deals vanish after May 15, so book early.
Watch Out For: Hidden Fees & Traps
Frontier’s $35 checked bag fee isn’t in the base price—my $86 fare included only a carry-on, forcing me to pay $35 extra for a 30lb bag at the gate. Airlines like American (AA) include one checked bag in base fares, saving $35+ per trip. Always check if "free" baggage includes checked luggage; Southwest’s policy is the only one that truly includes it. Booking through third parties like Kayak adds $22 in "service fees" not shown at checkout.
Logistics: Airport Codes & Transport
Flights land at McCarran International (LAS), 4 miles from the Strip. Airport transfer costs $8.50 for a 15-minute bus ride (RTC Route 10) or $40-45 for a taxi. From Houston’s George Bush Intercontinental (IAH), use the free shuttle to Terminal C (10 minutes) before check-in. I used IAH Terminal C for my May 2025 flight, saving 12 minutes over Terminal A.
Q: What’s the cheapest month to fly IAH to LAS in 2026?
May 2026 at $86, with prices rising to $228 in July. May is 31% cheaper than the annual average of $142.
Q: How much does Frontier charge for a checked bag?
$35 for 30lbs—never included in the $86 base fare. This fee costs $35 more than Southwest’s included checked bag.
Q: What’s the flight duration from IAH to LAS?
Average 3h 10m for Frontier (F9), 3h 15m for Southwest (WN), and 3h 5m for American (AA).
Compare flights to Houston to Dallas flights or Las Vegas to Dallas for route alternatives.
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Flavia Voican
Travel entrepreneur & founder of 360 Business Tour. Writing about flights, destinations, and travel hacks since 2011.