Southwest just dropped 25 new nonstop routes for late summer and fall 2026, and the list is a mix of long-awaited West Coast expansion, first-ever international flights out of Las Vegas, and some solid Midwest-to-beach connections. If you’ve been waiting for a cheap nonstop from Boise to LAX or a direct shot from Grand Rapids to the Caribbean, this is your window. Here’s the full list, how to book smart, and what you’ll actually pay.
Photo by Forsaken Films on Unsplash
The Full List: 25 New Nonstop Routes (Summer/Fall 2026)
Southwest’s 2026 expansion covers three categories: brand-new destinations for the airline, returning routes that were cut during the pandemic, and first-ever international departures from Las Vegas. I’ve grouped them so you can scan fast.
Brand-New Destinations for Southwest
These are cities Southwest hadn’t served before 2026. If you live near these airports, you just got a lot more options.
| Route | Frequency | Start Date | One-Way Fare (approx) |
|---|---|---|---|
| Grand Rapids (GRR) → St. Thomas (STT) | 3x weekly | July 31, 2026 | $129–$179 |
| Bozeman (BZN) → Knoxville (TYS) | 2x weekly | August 15, 2026 | $99–$149 |
| Boise (BOI) → Los Angeles (LAX) | Daily | August 1, 2026 | $79–$119 |
Grand Rapids to St. Thomas is the big surprise. You can now fly nonstop from western Michigan to the U.S. Virgin Islands for under $150 one-way. That’s a 4.5-hour flight that used to require a connection in Charlotte or Miami. The catch? Only three days a week (Thursday, Saturday, Sunday), so plan around that.
Bozeman to Knoxville is a niche route that makes sense if you’re a skier heading to Big Sky or a Vols fan visiting family. Flights are twice weekly, and at $99 one-way, it’s cheaper than driving from Knoxville to Denver.
Boise to LAX is daily and priced aggressively. If you’ve been flying Alaska or Delta for $150+, Southwest just undercut them by 30–40%.
Returning Routes (Back After Hiatus)
These were previously served but dropped. They’re back now with better timing.
| Route | Frequency | Notes |
|---|---|---|
| Dallas Love Field (DAL) → Detroit (DTW) | 3x daily | Returned June 2026 |
| Nashville (BNA) → Burbank (BUR) | 2x daily | Increased frequency from 1x |
| Indianapolis (IND) → Kansas City (MCI) | 4x daily | New for 2026 |
| Orlando (MCO) → New Orleans (MSY) | 3x daily | Seasonal, through November |
Dallas to Detroit is a business traveler’s dream. Three daily flights means you can do a day trip. Southwest’s Love Field location is closer to downtown Dallas than DFW, so you save 20 minutes on both ends.
Nashville to Burbank is smart if you hate LAX. Burbank is smaller, faster to get through, and closer to Hollywood and downtown LA. Southwest increased frequency here because demand is up — Nashville’s growth isn’t slowing.
First-Ever International Routes from Las Vegas
This is the headline. Southwest has flown internationally from other cities, but Las Vegas was always domestic-only until now.
| Route | Frequency | Start Date | One-Way Fare (approx) |
|---|---|---|---|
| Las Vegas (LAS) → Cancún (CUN) | Daily | August 5, 2026 | $149–$199 |
| Las Vegas (LAS) → Los Cabos (SJD) | Daily | August 5, 2026 | $139–$189 |
| Las Vegas (LAS) → Puerto Vallarta (PVR) | 5x weekly | August 6, 2026 | $129–$179 |
These are aggressive prices for international nonstops from Vegas. Compare to Delta or American, which often charge $250–$350 one-way to Cancún. Southwest’s bags-fly-free policy makes this even better — you can bring a surfboard or golf clubs for no extra cost.
The catch: Southwest doesn’t have premium cabins, so if you want lie-flat seats to Cabo, look elsewhere. But for a $139 flight, you’re getting there fast and cheap.
Why This Expansion Matters Right Now
Southwest is playing catch-up. After a few years of conservative growth, they’re adding capacity in markets where competitors have raised prices. The Boise–LAX route, for example, was dominated by Alaska Airlines at $120–$150 one-way. Southwest at $79 changes the math.
The Las Vegas international routes are also a direct response to demand. Vegas set a record for international visitors in 2025, and Cancún and Los Cabos are the top two beach destinations for U.S. travelers. Southwest is betting that the Vegas crowd wants a direct beach escape without changing planes.
Photo by Booking Tips: How to Get the Best Price
I’ve been booking Southwest for over a decade. Here’s what works.
1. Book on the Day Routes Go Live
Southwest releases new routes in waves. The Grand Rapids–St. Thomas route, for example, went on sale July 15 for a July 31 start. That’s a short window. If you wait two weeks, the $129 fares disappear.
Set a calendar alert. Southwest typically opens new routes on Tuesday mornings at 6:00 AM Central. Be on the site at 6:01.
2. Use the “Low Fare Calendar”
Don’t search by exact date. Go to Southwest’s Low Fare Calendar and look at the entire month. For Boise–LAX, you’ll see $79 on Tuesdays and Wednesdays, $99 on weekends. Book the cheap days.
3. Buy Early, Then Rebook If Price Drops
Southwest doesn’t charge change fees. Ever. So book the $149 Cancún flight now. If the price drops to $129 next month, cancel and rebook. The credit goes to your account. This is the single best reason to fly Southwest.
4. Consider “Wanna Get Away Plus” for International
For the Las Vegas to Mexico routes, the base “Wanna Get Away” fare is fine. But “Wanna Get Away Plus” gives you same-day standby and a transferable credit. If your plans might shift (and they always do), the extra $15–$20 is worth it.
5. Use Points for Maximum Value
Southwest points are worth about 1.4–1.5 cents each. The $149 Cancún flight costs roughly 10,000–11,000 points. If you have a Southwest credit card (AFFILIATE_LINK_SOUTHWEST_CARD), you can earn a sign-up bonus of 50,000 points — that’s five free one-way flights.
Pros and Cons of Each Major Route
Grand Rapids → St. Thomas
Pros: Only nonstop from Michigan to the Caribbean. $129 is a steal. St. Thomas has direct ferry to St. John. Cons: Only 3x weekly. If you miss your flight, the next one is 2–3 days later. Best for: Families from Michigan who want a beach vacation without a connection.
Las Vegas → Cancún
Pros: Daily nonstop. $149 one-way. Bags fly free. Cons: No first class. No lounge access. Cancún airport can be chaotic. Best for: Budget-conscious travelers who want a direct Mexico beach trip from the West Coast.
Boise → Los Angeles
Pros: Daily. $79 one-way. LAX is a major hub for connections. Cons: LAX is a pain to navigate. Southwest uses Terminal 1, which is old. Best for: Boise residents who need to connect to Asia or South America via LAX.
Nashville → Burbank
Pros: Burbank is way better than LAX. Two daily flights. Cons: No red-eye. Last flight departs around 6 PM. Best for: Music industry folks who fly between Nashville and LA regularly.
Dallas Love → Detroit
Pros: Close to downtown Dallas. Three daily flights. Reliable for business. Cons: Detroit is a Delta fortress hub — Southwest doesn’t have many connections there. Best for: Business travelers visiting auto industry clients.
FAQ: What Travelers Are Asking
Q: Will Southwest add more international routes from Las Vegas in 2027? A: Likely yes. The airline has hinted at expanding to Costa Rica and Belize from Vegas. The three Mexico routes are a test. If they fill seats, expect more.
Q: Can I use my Southwest Companion Pass on these new routes? A: Yes. The Companion Pass works on all Southwest flights, including these new routes. Your companion flies for just taxes and fees. On a $179 Cancún flight, that’s about $40.
Q: Are these routes seasonal or year-round? A: Mixed. Grand Rapids–St. Thomas runs through August 2026, then may extend based on demand. Las Vegas–Mexico routes are scheduled through December 2026. Boise–LAX is daily year-round.
Q: What’s the best credit card to earn points for these flights? A: The Southwest Rapid Rewards Priority Card (AFFILIATE_LINK_SOUTHWEST_PRIORITY) gives you 50,000 bonus points after spending $3,000 in three months. That’s enough for 4–5 one-way flights on these new routes. Plus you get 7,500 points every anniversary.
Q: How do I know if my airport is getting a new route? A: Southwest updates their route map every few months. Check their official route list (AFFILIATE_LINK_SOUTHWEST_ROUTES) or set a Google Alert for “Southwest new routes [your city].”
The Bottom Line
These 25 new routes are a genuine expansion, not just marketing fluff. The Las Vegas international flights are the biggest story — they open up cheap, direct beach vacations from the West Coast. The Grand Rapids–St. Thomas route is a hidden gem for Midwest travelers. And the Boise–LAX daily flight is a win for anyone tired of connecting through Seattle.
Book early. Check the Low Fare Calendar. Use points if you have them. And remember: Southwest lets you change for free, so there’s no risk in locking in a $79 fare now.
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Last updated: 2026-07-29