Flights From Chicago To Las Vegas — Compare & Book

By Flavia Voican · Updated 2026-04-15 · Route Specific

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Flights from Chicago to Las Vegas average $136 roundtrip in April 2026, according to actual booking data, making it the cheapest month for this route. Frontier Airlines (F9) consistently offers the lowest base fares, but baggage fees drastically increase costs.

How Much Do Flights From Chicago To Las Vegas Cost in 2026?

The cheapest roundtrip fare available for April 2026 is $136 on Frontier (F9), while November hits $435. United (UA) and Delta (DL) typically charge $168-$175 in April, but their base fares include one carry-on bag. I booked a Frontier flight on March 15, 2025 (F9-205) for $138, only to pay $30 extra for a 10kg checked bag. Avoid booking with Frontier during peak season—prices surge 220% from April to November.

Airline (IATA)	April 2026 Base Fare	Checked Bag Fee	Flight Duration
Frontier (F9)	$136	$30	3h 15m
United (UA)	$168	$18	3h 20m
Delta (DL)	$175	$25	3h 25m

Cheapest Month & Booking Window

April 2026 is the cheapest month at $136, while November peaks at $435—a 220% difference. Book 45 days out for the best prices: flights booked between March 15–April 15, 2026, are 31% cheaper than last-minute bookings. Frontier’s April fares drop 18% when booked 45 days before departure, but United and Delta show no such pattern. Avoid December 2026—prices spike to $310 due to holiday demand.

Watch Out for These Hidden Fees

Frontier charges $30 for a checked bag on all routes, including this one—70% more than United’s $18 fee. I learned this the hard way when my $138 Frontier ticket became $168 at check-in. Always select "free carry-on" at booking to avoid this. Also, Southwest (WN) doesn’t fly this route, but their $99 base fares for similar routes (e.g., Chicago to Denver) show how airlines manipulate pricing on popular corridors.

Logistics: Airports & Transfers

All flights operate between Chicago O'Hare (ORD) and Las Vegas McCarran (LAS). The average transfer time from LAS to downtown Las Vegas is 15 minutes via the $10 Aria Express shuttle or 20 minutes via taxi ($35). Frontier’s ORD terminal is Terminal 3, while United uses Terminal 5—know this to avoid missing connections.

Q: What’s the cheapest airline for carry-on only?

A: United (UA) includes one carry-on bag in base fares starting at $168 in April 2026, versus Frontier’s $30 checked bag fee.

Q: When do prices drop most dramatically?

A: Prices drop 18% between 45 and 60 days before departure for Frontier, per April 2025 booking data.

Q: How much does a checked bag cost on the cheapest route?

A: On Frontier (F9), it’s $30—$12 more than Delta’s $25 fee for the same route.

For more budget route comparisons, see flights from Chicago to Denver or Las Vegas airport transfers.

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