Image Credits: Larry Johnson, Creative Commons 2.0
Published July 11, 2026 by

Nonstop Flights: Seattle to/from Denver or Las Vegas $56-$66 round-trip [August-October] – Frontier

[07/11/2026 @ 10:56 AM CT] Deal time-stamp.
[2026-07-13 10:10:00] This fare IS NO LONGER BEING MONITORED because the deal has expired, been removed, or became too old. If it goes back online we will send out another notification.

Deals are usually valid 24 to 72 hours after posting, but can expire at any time (see time-stamp).

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To book: Use our updated link list.

Or book with these sites: Frontier, Priceline, Skyscanner, Expedia, Travelocity, Tripadvisor, Orbitz, CheapTickets, Kayak.

Frontier has round-trip flights from Seattle (SEA) to Denver or Las Vegas (DEN, LAS) for $56-$66, NONSTOP. Flights August to October. Origin/Destination reversible.

If you use the Frontier Airlines World Mastercard®, you can avoid bag fees for your first two standard-sized checked-bags. The card has a $99 annual fee, so keep in mind that you’ll need to use the free bag perk at least once a year to break even. Bags normally cost between $49-to-$99 each-way, so if you plan on traveling with bags on Frontier often you can get a lot of potential savings from this perk.

If you don’t have a way to avoid bag fees, consider using a small backpack as your “personal item” when flying Frontier. Dimensions for my Jansport backpack are: 18″ x 13″ x 8.5″. Which is half-an-inch larger than what is officially allowed by Frontier, but it has never been a problem for me. Bag designs like the Jansport SuperBreak backpack (linked) have the same dimensions as the bag I’m using, and also have a large main compartment, which makes it ideal for stuffing as much as you can into the limited amount of space.

Recently starting in 2025, Frontier has made some changes to how they operate bringing them closer in-line to a regular carrier. The first change is adding “first class” seating in the first two rows of their aircraft, the seat size and type is similar to business/first class domestic seating on most regular carriers. The second change is allowing Gold Status and above to get complimentary upgrades into the new “first class” seating. The last major change is that Platinum and Diamond Elite members can get a companion pass for just the tax+fees, which isn’t free, but it avoids the airfare cost of the ticket. There is no limit on the number of times the Companion Travel benefit can be used and the companion can be changed for each flight. This can generate substantial savings if you travel with a partner on Frontier often.

You can usually save more money by booking your flight+hotel together as a package instead of separately.

We post new flight deals often! You can check out our other deals by returning to the Front Page of our website: escape.flights (linked).

Here are some other offers that we think are worth mentioning. List updated 04/21/2026.

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Use the example date links on our website to pull up the fare.

Denver fares: [2026-07-13 10:10:00] This fare IS NO LONGER BEING MONITORED because the deal has expired, been removed, or became too old. If it goes back online we will send out another notification.

Las Vegas fares: [2026-07-23 08:11:00] This fare IS NO LONGER BEING MONITORED because the deal has expired, been removed, or became too old. If it goes back online we will send out another notification.

When you are ready to book your flight or hotel, please use the links on our site to begin your booking process so we receive credit for the referral.

  • Tips: Different booking websites will often have differing routes, prices, and availability. Before you finalize your purchase, do a quick check on Expedia, Skyscanner, and Kayak to see if any other site or airline is offering a better deal.


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Ren P. Artemio

Ren P. Artemio

Ren is the Chief Director of Nap Times at Escape Houston, Escape ATX, Cheap DFW, and Escape Flights. He really likes researching airfare and the travel industry, especially when it means getting a cheap flight to anywhere (he's not picky).

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