Frontier Airlines began flying eight domestic routes this week that vanished when Spirit Airlines shut down in early May, restoring budget nonstops in markets such as Boston to Orlando, Detroit to Las Vegas, and Dallas Fort Worth to New Orleans. Most of the flights started on July 5, with Detroit to Las Vegas following on July 6.
To mark the launches, Frontier is selling introductory one way fares from $39, but the promotional prices must be booked by July 12 and apply to travel between August 3 and September 2. The main beneficiaries are leisure travelers in those cities, many of whom lost their cheapest nonstop option when Spirit collapsed.
- What launched: eight domestic city pairs Frontier took over after Spirit ceased operations.
- When: most began July 5, 2026; Detroit to Las Vegas began July 6, 2026.
- Boston (BOS) to Orlando (MCO): daily, introductory fare from $69 each way.
- Dallas Fort Worth (DFW) to New Orleans (MSY): daily, from $39.
- Detroit (DTW) to Fort Lauderdale (FLL): daily, from $49.
- Detroit (DTW) to Philadelphia (PHL): daily, from $79.
- Detroit (DTW) to Las Vegas (LAS): daily, from $79.
- Las Vegas (LAS) to Kansas City (MCI): four times a week, from $69.
- Orlando (MCO) to Memphis (MEM): three times a week, from $69.
- Orlando (MCO) to Richmond (RIC): three times a week, from $59.
- Booking deadline: 11:59 p.m. Eastern on July 12, 2026, for nonstop travel from August 3 to September 2, 2026.
- Primary source: Frontier Airlines newsroom release dated July 5, 2026.
What changed
Spirit Airlines stopped operating in early May 2026 after a long financial decline, pulling its aircraft from dozens of leisure markets. Frontier said at the time that it would move into several of those markets, naming Orlando, Las Vegas, Dallas Fort Worth, Fort Lauderdale, and Detroit, but it did not publish specific routes.
This week it did. In a newsroom release dated July 5, Frontier confirmed the eight city pairs, their frequencies, and their launch dates, and Josh Flyr, the airline’s vice president of network and operations design, framed the additions as a way to keep affordable flights available through the summer and beyond.
All eight are flown by Frontier’s Airbus narrowbody fleet.
Why it matters
In several of these markets Spirit was the main discount carrier, so its exit tended to push nonstop fares up or force connections. Frontier’s return puts a budget nonstop back on the board and, at introductory prices as low as $39 each way, undercuts most legacy pricing for the launch window.
The competitive stakes are visible in Frontier’s own math. The airline has told investors it expects Spirit’s collapse to lift its revenue per available seat mile, a core measure of pricing power, by 3 to 5 percent, which signals that Frontier sees room to raise unit revenue as a large discount rival leaves the field.
For travelers the immediate benefit is price, but the medium term question is whether fares hold once the introductory period ends and one fewer competitor remains.
Planning impact
The clearest wins go to travelers who live in these specific city pairs and can fly on Frontier’s promotional dates. If a trip falls between August 3 and September 2 and can be booked by July 12, the introductory fares are worth a direct comparison against Southwest, the legacy carriers, and any one stop alternatives.
Frequency matters here. Boston to Orlando, all three Detroit routes, and Dallas Fort Worth to New Orleans run daily, but Las Vegas to Kansas City operates four times a week and the two Orlando routes to Memphis and Richmond run three times a week, so the day of the week can decide whether the flight even exists for a given date.
Travelers who need to fly outside the promotional window should wait to compare, because standard Frontier fares run higher and the airline prices its seats dynamically.
What to verify
Frontier notes that frequencies and times can change, so confirm the live schedule inside the booking flow before committing to hotels or connections. The advertised prices are base fares only.
Frontier sells a bare product in which a cabin bag beyond a small personal item, a checked bag, a chosen seat, and other extras cost more, so the true cost of a $39 fare can climb quickly once bags and a seat are added. Compare the all in total rather than the headline number, and check whether a bundle or the airline’s Discount Den membership changes the math.
Introductory seats are also limited and may already be gone on peak dates, so a quick search will show whether the promotional price is still available for the days you want.
Context from other sources
Independent coverage confirmed the launch and filled in the market context. AirlineGeeks reported that most of the routes came online on Sunday, July 5, with Detroit to Las Vegas following on Monday, July 6, and noted that Frontier had signaled this expansion immediately after Spirit’s shutdown in May.
The same report cited Frontier’s guidance that Spirit’s exit should help lift unit revenue by 3 to 5 percent, and flagged that Frontier is not the only carrier chasing Spirit’s leftovers, pointing to a report that Delta is pursuing former Spirit gates in Atlanta. The takeaway for travelers is that Spirit’s markets are being split among several airlines rather than handed to one, which makes the durability of these low fares worth watching.
Decision matrix
| Traveler situation | Best next step |
|---|---|
| What launched | eight domestic city pairs Frontier took over after Spirit ceased operations. |
| When | most began July 5, 2026; Detroit to Las Vegas began July 6, 2026. |
| Boston (BOS) to Orlando (MCO) | daily, introductory fare from $69 each way. |
| Dallas Fort Worth (DFW) to New Orleans (MSY) | daily, from $39. |
| Detroit (DTW) to Fort Lauderdale (FLL) | daily, from $49. |
| Detroit (DTW) to Philadelphia (PHL) | daily, from $79. |
- Confirm official sources: verify dates and rules on the operator page before you spend money.
- Match your itinerary: only change the trip piece this story actually touches.
- Keep a cancel path: prefer flexible bookings while details are still moving.
For broader planning context, see our airline and airport guides and confirm the operator details on the official site before you change bookings.
Which former Spirit routes did Frontier take over?
Eight domestic city pairs: Boston to Orlando, Dallas Fort Worth to New Orleans, Detroit to Fort Lauderdale, Detroit to Philadelphia, Detroit to Las Vegas, Las Vegas to Kansas City, Orlando to Memphis, and Orlando to Richmond.
How low are the launch fares, and when is the deadline to book?
Introductory one way fares start at $39, with others at $49, $59, $69, and $79 depending on the route. They must be purchased by 11:59 p.m.
Eastern on July 12, 2026, and apply to nonstop travel from August 3 through September 2, 2026.
Do the $39 fares include a bag or a seat assignment?
No. Those are base fares on a bare product.
A checked bag, a cabin bag larger than a personal item, and a chosen seat cost extra, so compare the total price with a bag and a seat before assuming Frontier is the cheapest option.
Are all of these flights daily?
Not all. Boston to Orlando, Dallas Fort Worth to New Orleans, and all three Detroit routes run daily.
Las Vegas to Kansas City operates four times a week, and the two Orlando routes to Memphis and Richmond run three times a week, so check the specific date.
Why did these routes become available?
Spirit Airlines ceased operations in early May 2026 after a prolonged financial decline. Frontier, another budget carrier, moved into several markets Spirit had abandoned, and these eight routes are the first specific launches from that plan.
