The Best Low-Cost Airlines for
Caribbean & Mexico Travel
I have flown on every single budget airline serving the Caribbean and Mexico. Here is my honest breakdown of which ones are worth it, what they actually cost, and how to dodge the hidden fees.
See the Top 8 AirlinesWhy Low-Cost Airlines Are Your Ticket to Paradise
I remember booking my first trip to Cancun back in 2019. The big airlines wanted $480 round-trip. Then I found a Spirit flight for $138. That moment changed how I travel forever. Low-cost airlines have opened up the Caribbean and Mexico to everyone, not just people with big budgets. But here is the catch — you need to know how to play their game. I have spent years learning the tricks, and I am sharing everything I know right here.
8 Best Low-Cost Airlines Flying South
Spirit Airlines
I have flown Spirit to Cancun, Punta Cana, and San Juan more times than I can count. They are the undisputed king of cheap Caribbean flights from South Florida.
- Flies to 15+ Caribbean destinations including Cancun (CUN), Punta Cana (PUJ), San Juan (SJU), Montego Bay (MBJ), and Aruba (AUA)
- Base fares start at $38 one-way from Fort Lauderdale
- Free personal item (18x14x8 inches) included
- Best booking window: 4-8 weeks ahead for lowest fares
Frontier Airlines
Frontier surprised me on my trip to Punta Cana last spring. Their fares from Orlando were unbeatable, and the A320neo was actually pretty comfortable.
- Caribbean routes include Cancun (CUN), Punta Cana (PUJ), San Juan (SJU), and Santo Domingo (SDQ)
- Base fares from $44 one-way from Orlando and Denver
- Den Discount Club saves 10-15% if you fly often
- Watch out: seat selection adds $12-50 per segment
Allegiant Air
Allegiant is my secret weapon for getting to Mexico from smaller cities that the big airlines ignore. Their Punta Gorda base is gold for Florida departures.
- Flies to Cancun (CUN) and Puerta Vallarta (PVR) from secondary U.S. airports
- Base fares from $49 one-way, often cheaper than Spirit
- Bundle deals save big: flight plus hotel packages up to 30% off
- Limited frequency — usually only 2-3 flights per week per route
JetBlue Airways
JetBlue is the one I book when I want cheap AND comfortable. Free Wi-Fi, free snacks, and actual legroom make a huge difference on a 4-hour flight to the Caribbean.
- Serves 20+ Caribbean and Mexico destinations including Cancun, Nassau, Montego Bay, and St. Lucia
- Free checked bag, Wi-Fi, live TV, and snacks even on basic economy
- Base fares from $79 one-way from JFK and BOS
- TrueBlue points never expire and cover award flights with low mileage
Southwest Airlines
Southwest changed the game for me when they started flying to Cancun. Two free checked bags and no change fees means zero surprises at the airport.
- Flies to Cancun (CUN), San Jose del Cabo (SJD), and Puerto Vallarta (PVR) in Mexico
- Caribbean routes include Havana (HAV), Nassau (NAS), and Montego Bay (MBJ)
- Two free checked bags up to 50 lbs each — no other budget airline does this
- No change or cancellation fees ever, even on the cheapest fare
Volaris
If you are flying within Mexico or want the absolute cheapest way into the country, Volaris is your airline. I flew them from Chicago to Guadalajara for $89.
- Largest low-cost carrier in Mexico with 40+ domestic routes
- U.S. gateways include Chicago, Los Angeles, Houston, Dallas, New York, and Miami
- Base fares from $69 one-way on international routes, domestic from $35
- VClub membership ($9/year) unlocks exclusive discount fares up to 40% off
Sun Country Airlines
Sun Country is the budget option nobody talks about for Caribbean travel. Their seasonal routes from Minneapolis to Cancun and Montego Bay are seriously cheap in off-peak months.
- Seasonal Caribbean routes to Cancun (CUN), Montego Bay (MBJ), and Punta Cana (PUJ)
- Also serves San Juan (SJU) and Nassau (NAS) seasonally
- Base fares from $89 one-way during peak winter escape season
- Best deals found October-early December and late April-May
Avelo Airlines
Avelo launched in 2021 and I have been watching them closely. They are expanding fast with routes to Mexico from smaller West Coast and East Coast airports.
- Flies to Cancun (CUN) and Puerto Vallarta (PVR) from Southern California
- New routes from Connecticut to Caribbean destinations launching 2026
- Base fares from $39 one-way, some of the lowest in the industry
- Very limited routes but expanding rapidly — check their route map monthly
Low-Cost Airlines Side by Side
I put together this comparison so you can see exactly what you get with each airline. Notice how the cheapest base fare does not always mean the cheapest total trip.
| Airline | Caribbean & Mexico Routes | Carry-On Bag | Seat Selection | Avg. Round-Trip |
|---|---|---|---|---|
| Spirit | 15+ destinations | $40-65 | $12-50 | $145 |
| Frontier | 4 Caribbean cities | $35-60 | $12-50 | $168 |
| Allegiant | Cancun, PVR | $20-45 | $7-35 | $192 |
| JetBlue | 20+ destinations | Free | Free choice | $245 |
| Southwest | 6 destinations | Free | Open seating | $278 |
| Volaris | 40+ Mexico routes | $25-50 | $10-40 | $156 |
| Sun Country | 5 seasonal routes | $30-55 | $15-45 | $215 |
| Avelo | Cancun, PVR | $25-45 | $8-30 | $178 |
My Top Tips for Flying Budget Airlines
I have made every mistake in the book so you do not have to. Follow these tips and you will save hundreds on your next Caribbean or Mexico trip.
- 1Book at the right time. I track prices weekly and the sweet spot is always 4-8 weeks before your trip. Book earlier and prices drop later. Book later and last-minute fares spike. I saved $120 on my Cancun flight by waiting two extra weeks.
- 2Know your bag before you buy. This is the biggest budget airline trap. Spirit's $38 fare becomes $118 when you add a carry-on and seat selection. I always check the total price with bags before clicking buy. Use the airline's app to prepay bags — it is always cheaper than paying at the airport.
- 3Join the loyalty clubs. Frontier's Den Discount Club pays for itself after one trip. Volaris VClub costs $9 per year and saves up to 40%. I have saved over $400 in two years with these memberships.
- 4Bring your own food and water. Budget airlines charge $8-12 for snacks and $5 for water. I pack an empty water bottle through security and fill it at the fountain. Snacks from home save $20+ per flight segment.
- 5Use the 24-hour rule. Every U.S. airline must give you a full refund within 24 hours of booking. I book the flight, keep tracking prices, and if the fare drops I cancel and rebook. This trick has saved me $200+ on a single trip.
Low-Cost Airline FAQ
Which budget airline is best for Cancun?
From my experience, Spirit and JetBlue are the top picks for Cancun. Spirit has the lowest base fares from Fort Lauderdale starting at $38 one-way. JetBlue gives you more comfort with free Wi-Fi and snacks for about $100 more round-trip. If you are flying from the Northeast, JetBlue is the clear winner.
Do budget airlines fly to Punta Cana?
Yes, four budget airlines serve Punta Cana: Spirit, Frontier, JetBlue, and Sun Country (seasonal). Spirit has the most frequent service from Fort Lauderdale. I flew Spirit there last year for $142 round-trip including a checked bag I prepaid during booking.
They can be if you do not plan ahead. A $38 Spirit fare can become $160+ after adding a carry-on bag, seat selection, and priority boarding. My rule: always check the total price with bags and seats before buying. I use Google Flights to compare, then book directly on the airline site.
What is the cheapest month to fly to the Caribbean?
I have found September and October to be the cheapest months. Fares drop 30-50% because it is hurricane season. If you are flexible, November and early December are the sweet spot — lower prices with better weather. Avoid Christmas week and spring break when prices double.
Can I use airline credit cards to save more?
Absolutely. I have the JetBlue Plus Card and it pays for itself with the free first checked bag alone. The Spirit Free Spirit card gives you priority boarding and a free carry-on. If you fly the same airline more than twice a year, their credit card usually saves you money.
Is it safe to fly budget airlines internationally?
Yes, all U.S. and Mexican budget airlines meet the same FAA safety standards as the major carriers. The planes are the same Boeing and Airbus models. You are paying for less legroom and fewer freebies, not less safety. I have flown over 50 budget airline flights without a single safety issue.
Ready to Fly South for Less?
The deals are out there right now. Use the search widget above to compare all airlines at once and find the cheapest flights to your Caribbean or Mexico destination. I update this guide every month with the latest routes and prices.
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