Cheap flights from Portland to Las Vegas from $74

The month of August is, on average, the cheapest month to fly to Las Vegas from Portland, with most prices found around $187. The month of September is another great option to travel to Las Vegas, with average flight prices from Portland averaging around $187.

Our data shows that Monday is the least expensive day to fly to Las Vegas. Tickets to fly out on this day can be as low as $200. Flights from Portland to Las Vegas on a Thursday will generally be more expensive and average around $259. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

The cheapest time of day to fly to Las Vegas is in the evening when flights can be purchased for as low as $193. Flights to Las Vegas are more costly in the morning, with an average ticket price of $254. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Portland to Las Vegas Harry Reid Intl for the best Portland - Las Vegas Harry Reid Intl flight prices

You are more likely to see cheaper flights to Las Vegas from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Las Vegas for around $228 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Las Vegas from Portland for as low as $184 on momondo.

There are 4 cabin classes available to choose from on Portland to Las Vegas Harry Reid Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

United Airlines and Southwest are the most popular carriers operating from Portland to Las Vegas Harry Reid Intl

Alaska Airlines, Spirit Airlines and Frontier are the top three most popular airlines that fly to Las Vegas from Portland according to our data. Alaska Airlines is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Las Vegas. Keep in mind that there are 8 different airlines that fly to Las Vegas on a routine basis, so you have a few additional options to choose from.

Historically, on average around 10% of flights between Portland and Las Vegas have experienced a delay on any given week. The average delay length over the past 12 months has been 117 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, Spirit Airlines have had the least number of delays on this route over the last 12 months; with about 8% of their flights experiencing any sort of delay.

As of March 2026, 7 flights take off from Portland and land in Las Vegas each day. The most common flight departure time for this route is 10:00AM, with 51% of daily flights taking off in the afternoon.

The number of flights available between Portland and Las Vegas is 49 per week as of March 2026. The most frequent departure day is Mon, with 24% of weekly flights leaving on this day.