This summer is poised to be one of the busiest for travel, with millions of Americans taking to the sky to reach their vacation destinations.

While soaring demand for travel this season will mean exorbitant airfares for some, flexible travelers can save by knowing when to book, flying at off-peak times and choosing?the right origin and destination airports.

Here are some exciting flight routes that won't blow your summer travel budget.

While you can make the drive between Los Angeles and Las Vegas in a few hours, the one-hour nonstop flight can be booked for under $50 one-way and less than $100 roundtrip on Southwest Airlines this summer.

The quick travel time makes the route a great weekend option or even a doable day trip.?

Travelers looking to explore the Last Frontier this summer can book nonstop roundtrip flights from United Airlines' hub at Chicago O'Hare International Airport to Alaska's Ted Stevens Anchorage International Airport this July for under $400 (basic economy).

Passengers can upgrade to economy and still pay just $471 for roundtrip flights on July 15 and July 21.

Travelers can take advantage of two of JetBlue's focus cities to enjoy an affordable summer vacation in the Caribbean.

You can fly nonstop from Orlando to San Juan, Puerto Rico without a passport for as low as $135 this July or $160 with the inclusion of a carry-on bag.

Travelers looking to bask in the desert sunshine in Phoenix and Scottsdale can reach the Valley of the Sun for super cheap with Allegiant Air this summer.

You can fly nonstop from Houston for as little as $76 roundtrip with the ultra-low-cost carrier this June.

A summer getaway to the Hawaiian Islands doesn't have to break the bank. United Airlines customers can fly nonstop from San Francisco to Honolulu for around $400 roundtrip if they have the flexibility to fly midweek.?

Travelers in the Mid-Atlantic seeking a tropical getaway this summer can fly from Baltimore to Montego Bay, Jamaica for under $350 roundtrip with budget carrier Spirit Airlines.

Booking with the no-frills carrier will allow you to splurge on an all-inclusive stay in this Caribbean hotspot.

Make your dream Mexican summer vacation a reality by flying nonstop from Dallas to Cancun for less than $235 roundtrip with budget carrier Frontier Airlines.

Or spend a little extra to book with legacy carriers such as American Airlines and United Airlines.