The Department of Transportation (DOT) DB1B data is out for Q2, meaning we can take a look at revenue trends on a route level for the domestic market. This is always overwhelming for me since there are so many different things to look at. At last check, I had 15 different tabs in my spreadsheet, and as always, I’ve found some fun stuff. So instead of focusing on one trend, I thought I’d pull out five nuggets to share here.
But first, a couple definitions:
- Available Seat Mile (ASM): The total number of miles each seat flew, all added together
- Revenue Passenger Mile (RPM): The total number of miles flown by a seat when occupied, all added together
- Load Factor: RPMs/ASMs to find the total percent of seat miles that were filled
- Yield: Passenger revenue divided by RPMs (helps think about fare trends)
- PRASM: Passenger revenue divided by ASMs (like yield but impacted by load factor, so it’s a broader view)
- SLA: Stage-length adjusted since shorter flights tend to mean higher yield and PRASM, so we adjust in this case to 1,000 miles on average to compare apples to apples
#1 – Las Vegas is Awful, But Not as Awful If You’re Southwest
YoY % Chg in Las Vegas

DB1B/T100 Data via Cirium, carriers shown by market size from left to right
Just look at this carnage in Vegas. Only one airline saw positive trends at all, and that was Frontier. But to be fair, Frontier saw its seats drop, so that always helps. (This was also one of Frontier’s worst-performing markets, as you’ll see shortly.) Spirit, on the other hand, saw its seats plunge, but it still saw fares fall off an absolute cliff.
It wasn’t just fares though. Load factors tanked across the board. Overall, Vegas saw loads drop from 85.7 percent in Q2 2024 to 80.8 percent this year.
It’s hard to find much of a bright spot here outside of Frontier, but Southwest would be it. The city’s largest airline saw fares drop just under 3 percent which was better than anyone else. And that came on a 5.8 percent increase in seats. I’d call that good news.
#2 – Frontier Did Better Everywhere
Frontier YoY % Chg for Top 15 Markets

DB1B/T100 Data via Cirium, carriers shown by market size from left to right
Frontier has struggled along with everyone else in the ULCC space, but Q2 had a lot of positive trends for the airline. Remember how I said it looked better in Vegas than everyone else? That was one of the airline’s worst markets.
Denver had particularly good unit revenue performance while fares soared elsewhere. Now, keep in mind that this comes off a low base. But any progress is good for the airline.
#3 – JetBlue is Doing Just Fine in Fort Lauderdale
FLL SLA PRASM By Quarter

DB1B/T100 Data via Cirium
With Spirit on the ropes, the Fort Lauderdale market is one to watch. Spirit has already been in a tough spot, but it saw a small rebound in unit revenue trends. JetBlue, however? It was up. Everyone else that matters? They were down. Of course, it helps that everyone else had seats climb while both Spirit and JetBlue were down. But JetBlue was down only 9 percent on seats while Spirit was down 19 percent.
Keep in mind, this isn’t the whole story. This is just domestic, and the international market matters a lot here. Either way, with JetBlue’s already announced growth coming to FLL, it looks poised to pounce.
#4 – Southwest is Making Progress in Hawaiʻi
Southwest Unit Revenue for Hawaiʻi by Quarter

DB1B/T100 Data via Cirium
To say that Hawaiʻi has been a struggle for Southwest is probably an understatement, but look at Q2. Things are looking up.
Interisland seats dropped by about 15 percent from Q1 to Q2, and the fare even dipped ever-so-slightly. But loads soared from 48 percent to 60 percent (they were at 47 percent in Q2 2024), and that meant the unit revenue jumped by nearly 25 percent vs Q1 and more than 35 percent vs the previous year.
But don’t think this is just a matter of cutting capacity. For flights to the mainland, seats were up more than 6 percent vs Q1, but unit revenue was also up nearly 25 percent vs Q1 and 16 percent versus last year.
#5 – Breeze is Looking Even Better
Breeze Yield and Unit Revenue by Market Type for Q2 2025

DB1B/T100 Data via Cirium, dark blue shows Q2 2024 for comparison
You’ll remember that Breeze’s numbers in Q2 on the revenue side were looking pretty good. But if you think that’s good, take a look at this broken down by existing and new markets. I looked at markets that operated in Q2 2025 that also operated in Q2 2024 (Existing) and those that didn’t operate in Q2 2024 (New).
The difference in yield is one thing, but it’s the unit revenue that really stands out since the load factors on existing markets in 2025 were 10 points higher than new ones. All-in, the SLA PRASM was 6.9 cents, but existing markets were 7 percent higher than that at 7.4 cents. Keep in mind that existing markets saw more than 20 percent seat growth vs last year, so if Breeze would just slow down, its numbers would look significantly better. And they’re already not looking terrible compared to where they were.