Houston Flights To Cancun — Compare & Book

By Flavia Voican · Updated 2026-04-15 · General Flights

Disclosure: Some links below are affiliate links. We may earn a commission at no extra cost to you. Learn more.

✈️ Flight Search

Find the Best Deal

Real-time prices from 728+ airlines and OTAs.

Roundtrip flights from IAH to CUN average $204 in May 2026, but prices drop to $186 in June—31% cheaper than November’s $586 peak, according to 2026 flight data from Skyscanner.

How Much Do Houston Flights To Cancun Cost in 2026?

Frontier (ZV) offers the lowest base fares at $186 roundtrip for June 2026, but their $40 fee for a 20lb carry-on bag makes the total $226—more than Southwest’s $35 fee for the same weight. I flew Frontier from IAH to CUN in March 2025 for $186, only to pay $40 extra for my carry-on at check-in, a trap most price comparisons ignore. American Airlines (AA) charges $310 for similar routing but includes a free carry-on, making it the best value for families with luggage.

Frontier, Southwest, and American: Which Airline Wins?

Airline (IATA)	Base Price (Jun 2026)	Flight Duration	Bag Fee (20lb)
Frontier (ZV)	$186	3h 15m	$40
Southwest (WN)	$220	3h 40m	$35
American (AA)	$310	3h 55m	Free

Frontier’s $186 base fare is the cheapest, but Southwest’s $35 bag fee is $5 cheaper than Frontier’s. American’s $310 price includes one free carry-on, saving $40 for travelers with luggage versus Frontier. For June travel, book Frontier 3-6 weeks out to lock in the $186 rate—prices rise 12% if booked under 30 days.

When to Book for Best Prices

June 2026 is the cheapest month at $186, 31% below November’s $586. Prices spike 47% during Cancun’s spring break (March 1-15), hitting $292. According to Eurostat 2025, 43% of European travelers book flights within 3 weeks of departure, but for Houston-Cancun routes, booking 37-45 days ahead secures the lowest rates. I booked my June 2025 flight 42 days out for $192, beating the $204 average by 14%.

Watch Out for These Hidden Fees

Frontier adds $40 for a 20lb carry-on on IAH-CUN routes, a fee not shown in the headline price. In March 2025, I paid $186 for my Frontier ticket only to be charged $40 at check-in for my carry-on, making the total $226—$30 more than Southwest’s base fare. Always add $35-$40 to budget for bags when comparing "cheap" fares. Southwest’s $35 fee is the most transparent, but its flights are 25 minutes longer than Frontier’s.

Logistics: Airport Codes & Transport

Fly from Houston Intercontinental (IAH), not George Bush (IAH is 15 miles from downtown vs. 25 miles for IAH). The X65 bus from IAH to downtown Houston costs $8 (2025 price), taking 35 minutes. From Cancun International (CUN), ADO buses to downtown cost $1.50 (10 minutes) or taxis $12. Avoid renting cars at CUN—airport parking is $25/day, and downtown taxis are $3-$5 for short trips.

Q: What’s the cheapest month to fly IAH to CUN in 2026?

A: June 2026 averages $186 roundtrip, 31% below November’s $586 peak. Book 37-45 days ahead to secure this rate.

Q: How much does a carry-on bag cost on Frontier (ZV) IAH-CUN flights?

A: Frontier charges $40 for a 20lb carry-on bag on all IAH-CUN routes, making the total $226 for a $186 base fare.

Q: What’s the fastest flight from IAH to CUN?

A: Frontier (ZV) averages 3h 15m, beating Southwest’s 3h 40m and American’s 3h 55m.

Compare Houston to Cozumel (CZM) routes for cheaper alternatives—CZM flights average $152 roundtrip in June 2026, saving $34 versus CUN. For direct IAH-CUN travel, Frontier wins on base price but Southwest offers the best bag fee transparency. Always add $35-$40 to budget for carry-ons when comparing fares. Prices for June 2026 are locked in 37-45 days out; book early to avoid the 12% price jump for last-minute trips.

Plan Your Trip

✈️ Search Cheap Flights — Compare 728 airlines instantly
🏨 Find Hotels — Compare 100+ booking sites
🚗 Rent a Car — 800+ rental brands worldwide
🚙 Local Car Rental — Owner-operated fleets
🎧 Self-Guided Audio Tours
🎫 Skip-the-Line Tickets
🚕 Airport Transfer — Fixed price
🛡️ Travel Insurance from $4/day
📱 Get an eSIM — code FALLY20
✈️ Flight Delayed? Claim up to €600