The way that (Nasdaq: PCLN) keeps ascending, it's a wonder if it will ever land.

The travel portal came through with another blowout quarter last night. Revenue climbed 36% to $991 million in its latest quarter, and adjusted earnings improved 58% to $5.37 a share. Once again, profitability is growing faster than Priceline's top-line spurt. A scalable model is no match for travel service providers hoping to slash commissions.

Analysts have once again landed in the wrong place. Wall Street's pros were only expecting a tweaked profit of $5.05 a share on $968 million in revenue.

Priceline's growth has been impressive. One certainly doesn't expect a company scoring nearly $21.7 billion in gross bookings for all of 2011 to keep growing at a heady clip. (Nasdaq: CTRP) -- China's top travel website -- grew its revenue by just 18% during the same three months. Yes, the company that was growing at a faster rate than Priceline is now growing at half the latter's pace.

Is Priceline the niche's speedster? Pitting Priceline against conventional rivals Expedia and Orbitz Worldwide (NYSE: OWW) certainly makes it seem that way.

Orbitz, scoring just half of Priceline's gross bookings, actually suffered a 3% decline in net revenue during the same quarter. Expedia -- which is larger than Priceline given its $29.2 billion in gross bookings last year -- grew its revenue by a reasonable 14% in the fourth quarter.

Even if we open up the floor to travel deals publisher Travelzoo (Nasdaq: TZOO), Priceline is still the speedy one. Travelzoo's revenue climbed 23% in its latest quarter, meeting Priceline just two-thirds of the way there.

The only significant publicly traded travel website that can outrun Priceline in terms of percentage growth spurts is India's MakeMyTrip (Nasdaq: MMYT), but it's surprisingly close. The top travel website in the world's second-most populous nation grew its revenue -- after service costs -- by less than 37%. MakeMyTrip is so small and early in its growth cycle that it would take Priceline just four days to generate the gross bookings that MakeMyTrip is securing in an entire quarter. Even then, Priceline's growth on a percentage basis keeps things interesting.

Priceline's growth will decelerate. Last night's guidance calls for an adjusted profit of $3.80 a share to $3.90 a share on 22% to 27% in top-line growth. However, the midpoint of Priceline's outlook is in line with the 25% growth that Wall Street is expecting, and well ahead of the $3.72 a share in adjusted profitability targeted for the period.

Pack a passport
A whopping 62% of Priceline's revenue and 79% of its gross bookings are being generated internationally.

However, Priceline isn't one of the three American companies set to dominate the world according to a recent research report. Find out what the three companies are in the free report. It won't be around forever, so check it out now.  

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.