Affordable Airlines Serving Riverside and the Inland Empire

Riverside residents don’t have to overspend to get in the air. While Riverside Municipal Airport (RAL) mostly handles private and charter flights, two major commercial airports sit within a short drive. Ontario International Airport (ONT) and San Bernardino International Airport (SBD) are the true low-cost launchpads for the region. Southwest, Spirit, Frontier, Delta, United, Alaska Airlines, and emerging carriers like Breeze Airways and Avelo keep fares competitive on dozens of routes. You just need to know where to look and which airline matches your travel style.

This guide breaks down every major affordable airline serving the Riverside area, their direct-flight networks, fees, service quality, and the best booking strategies to lock in cheap tickets. Whether you fly one personal item or a pair of checked bags, want a nonstop to Las Vegas or a one-stop to the East Coast, the options around here are stronger than many travelers assume.

Alaska Airlines

Alaska Airlines isn’t the lowest bare-bones carrier, but its mix of reasonable base fares and included perks makes it a top choice for value-minded flyers out of Ontario. You’ll find service to Seattle, Portland, San Francisco, and beyond. Main Cabin passengers get free carry-ons and personal items, and change fees are a thing of the past on most tickets. If you join Alaska’s Mileage Plan, award redemptions stretch further than many legacy programs, and you can earn miles on international partner airlines.

For Riverside travelers, Alaska often undercuts Delta and United on West Coast hops, especially when booking four to six weeks ahead. The airline’s customer satisfaction scores regularly land near the top of industry surveys, which matters if you’ve been burned by ultra-low-cost competitors.

Southwest Airlines

Southwest remains the most popular budget-friendly operator at ONT, and for good reason. Southwest Airlines allows two free checked bags, no change fees, and one personal item plus a carry-on at no extra cost. The airline operates nonstop flights from Ontario to Denver, Phoenix, Las Vegas, Sacramento, Oakland, San Jose, Dallas, and Houston, with plenty of connecting one-stop routes to the Midwest and East Coast.

Because Southwest doesn’t appear on third-party booking sites, you’ll want to check its Low Fare Calendar directly. Fares often drop on Tuesdays, and the airline’s frequent sales can put short-haul round-trips well under $150. The open-seating policy isn’t for everyone, but it does speed up boarding. Riverside families and business travelers alike rely on Southwest’s consistency and transparency.

Spirit Airlines

When base price trumps everything else, Spirit Airlines steps into the ring. The carrier operates from both ONT and, increasingly, San Bernardino International Airport. You’ll often see flash sales with fares as low as $30 one-way if you join the $9 Fare Club or book during off-peak windows. Popular nonstop routes from the region include Las Vegas, Dallas-Fort Worth, and Houston.

The catch? Everything beyond a personal item costs extra. Carry-on bags, checked luggage, seat assignments, even a bottle of water onboard will add to your total. Spirit’s Big Front Seat offers a wider, more comfortable option at a premium, but it still doesn’t include bags. The smartest approach is to pack light, join the Saver$ Club, and buy only what you genuinely need. Spirit’s website clearly states all fees if you dig into the fine print.

Frontier Airlines

Frontier is Spirit’s closest rival, flying from Ontario and San Bernardino to Denver, Las Vegas, Phoenix, and multiple Florida cities. Base fares can dip below $40 during heavy promotions. Like Spirit, Frontier unbundles everything, charging for carry-ons, checked bags, and seat selection. The airline’s Discount Den membership ($59.99 per year) unlocks even lower fares and gives kids under 15 access to discounted family seats.

Frontier flies a modern all-Airbus A320neo family fleet, which is slightly quieter and more fuel-efficient than older planes. Seats don’t recline but weigh less, keeping operational costs low. Families looking for a cheap nonstop to Orlando or Las Vegas often find Frontier hard to beat, provided they pack strategically.

United and Delta: The Legacy Budget Options

Legacy carriers United and Delta aren’t typically called “budget airlines,” yet their basic economy tickets compete directly with no-frill rivals on many Ontario routes. United and Delta both fly from ONT to major hubs such as Denver, San Francisco, Los Angeles, Salt Lake City, Atlanta, and Minneapolis. When you spot a basic economy fare, you’ll sacrifice seat selection and boarding priority but gain a more generous carry-on policy than Spirit or Frontier often allow.

For Riverside travelers who want to connect to an international destination or appreciate a more predictable schedule, these two airlines still deserve a look. Flash sales and credit-card rewards can push basic economy fares close to budget-carrier territory.

New and Expanding Budget Carriers: Breeze Airways and Avelo

Two relative newcomers are rewriting the budget playbook for Inland Empire passengers. Breeze Airways, founded by the same entrepreneur who started JetBlue, currently operates a growing number of routes from San Bernardino International Airport. Breeze focuses on nonstop service between underserved city pairs, with fares starting below $50 one-way if you book the “Nicest” bundle or stick with the no-frills “Nice” tier. Popular early routes include Provo, Utah, and Hartford, Connecticut, with more destinations planned.

Avelo Airlines has also eyed SBD for expansion. Avelo’s model mirrors Breeze: really low base fares, simple booking, and add-on fees for anything beyond a small personal item. Both carriers put a premium on operating from smaller, less congested airports, which means quicker security lines and shorter walks to the gate. For Riverside flyers unwilling to drive to LAX, these airlines represent a growing roster of affordable nonstops.

A quick comparison at a glance helps before you book:

Airline Primary Airport(s) Near Riverside Free Baggage Base Fare Typical Range Best For
Southwest ONT 2 checked, 1 carry-on, 1 personal $80 – $250+ Bag-heavy travel, no change fees
Spirit ONT, SBD 1 personal item only $30 – $150+ Ultra-cheap base fares, light packers
Frontier ONT, SBD 1 personal item only $40 – $160+ Family fares with Discount Den
Alaska ONT 1 carry-on, 1 personal $90 – $260+ West Coast routes, loyalty perks
Delta ONT 1 carry-on, 1 personal (basic economy) $100 – $300+ Hub connections, international upgrades
United ONT 1 carry-on, 1 personal (basic economy) $100 – $300+ Frequent schedules, global network
Breeze SBD Varies by fare tier $40 – $180+ New nonstop routes, simple booking
Avelo SBD 1 personal item only $35 – $160+ Low-stress boarding, small airports

Direct Flight Options and Top Destinations

One of the biggest advantages of flying out of Ontario or San Bernardino is the growing list of nonstop destinations. You won’t need to connect through a congested mega-hub just to reach a weekend getaway or business meeting.

Southwest’s Nonstop Network from ONT

Southwest operates the most robust nonstop schedule for Riverside travelers. From Ontario, you can jet directly to Denver, Phoenix Sky Harbor, Las Vegas, Oakland, San Jose, Sacramento, Dallas Love Field, and Houston Hobby. Seasonal adds like Austin and Nashville pop up during peak travel periods. Most of these flights run multiple times daily, giving you real flexibility.

Spirit and Frontier Nonstops

Both ultra-low-cost carriers connect the Inland Empire to Las Vegas, Dallas-Fort Worth, and Denver year-round, with additional seasonal service to Orlando and other vacation hotspots. Frontier’s nonstop to Phoenix is a solid option when Southwest’s prices spike. Spirit often launches short-term routes to cities like Portland or Seattle, so it pays to check their route map every few months.

Legacy Nonstops from Ontario

Delta flies nonstop to Salt Lake City and Atlanta; United goes to Denver, San Francisco, and Houston Intercontinental; American operates nonstop to Dallas-Fort Worth and Phoenix; Alaska connects Ontario with Seattle, Portland, and San Francisco. While not always the cheapest base fare, these nonstops can save you a half-day connection when you’re headed to the Southeast or Pacific Northwest.

Breeze and Avelo’s Expanding Map

San Bernardino International Airport has quickly become a hub for Breeze’s east-west network. Nonstop flights to Provo, Hartford, and Las Vegas have performed well, and new city pairs are added frequently. Avelo’s strategy revolves around low-frequency but convenient nonstops to smaller airports that larger carriers ignore. Keep an eye on San Bernardino International’s website for route announcements. These airlines make the airport a legitimate alternative to ONT for budget travelers living in Riverside or San Bernardino.

Comparing Services, Fees, and Amenities

Choosing a budget airline means understanding exactly what you’re buying—and what you aren’t. Below we compare what you’ll actually experience onboard and how to calculate your true total cost.

Onboard Experience and Seat Comfort

Southwest seats average 32 to 33 inches of pitch, among the better figures for economy class, and all aircraft offer free live TV and messaging via onboard Wi-Fi. Delta, United, and Alaska follow closely, with seat pitch around 30 to 31 inches in basic economy and complimentary snacks plus soft drinks even on the cheapest fares.

Spirit and Frontier strip it down. Legroom drops to 28 to 29 inches on standard seats, and seat recline is minimal or nonexistent. Wi-Fi and entertainment screens are scarce; you’ll rely on your own device and downloaded content. Breeze and Avelo follow a similar minimal model, though Breeze’s “Nicer” and “Nicest” bundles include extra legroom and a snack/drink credit.

Baggage Policies Worth Understanding

Your bag strategy can easily add $60–$150 round-trip on ultra-low-cost carriers. Here’s what to expect:

  • Southwest: Two free checked bags, one carry-on, one personal item. No tricks.
  • Alaska, Delta, United (basic economy): Free carry-on and personal item; checked bag fees start around $35–$40 each way, though airline credit cards often waive the first checked bag.
  • Spirit and Frontier: Only one personal item is free. Carry-on bags cost $34–$65 when purchased at booking, more at the gate. Checked bags run $30–$50 if bought early. Their Saver$ Club or Discount Den members get slight discounts.
  • Breeze and Avelo: Similar à la carte system. A free personal item, but bags cost extra. Breeze’s bundled fares can include a carry-on or checked bag, often making the total price competitive with Southwest if you need luggage.

Customer Satisfaction and Reliability

Southwest consistently scores well in J.D. Power and other satisfaction studies, praised for hassle-free policies and friendly crews. Alaska Airlines also rides high on the same metrics. Spirit and Frontier have historically lagged, primarily due to surprise fees and tight seats, though both carriers have improved on-time performance in recent years. Breeze and Avelo are too new for long-term ratings but earn positive marks for friendly staff and easy check-in at smaller airports.

Before you book, it’s wise to check recent traveler photos and reviews on independent platforms to set your expectations about cleanliness, legroom, and boarding order.

Booking Tips and Smart Travel Planning

Getting the lowest fare near Riverside isn’t about a single secret—it’s a combination of timing, flexibility, and knowing where to compare.

When to Book and How to Track Fares

Buy your ticket at least 4 to 6 weeks before domestic travel. Last-minute fares spike dramatically, especially on popular routes like Ontario–Las Vegas. Use comparison aggregators like Google Flights and Skyscanner to see all carriers at once, but remember that Southwest won’t show up on those sites, so open a separate browser tab for Southwest.com. Set up price alerts; Google Flights and Hopper can notify you when fares drop.

Seasonal and Day-of-Week Strategies

Riverside travelers face predictable price swings. Summer and winter holiday periods see the highest fares, while late January through early March and late August through early October often yield the cheapest tickets. Tuesdays and Wednesdays are typically the least expensive days to fly, and airports are less crowded. If your schedule permits, try a Saturday departure or a midweek return to shave dollars off the total.

Nearby Airport Shopping

Don’t limit your search to just one airport. Ontario International (ONT) is the default, but checking San Bernardino International (SBD) can uncover promotional fares from Breeze or Avelo that undercut anything at ONT. Even Los Angeles International Airport (LAX) occasionally offers cheaper flights when factoring in sale prices, though you’ll trade the lower fare for extra drive time and parking costs. Weigh the total time and expense—a $40 cheaper fare might not justify a two-hour drive each way and $25 per day parking.

Leveraging Loyalty and Bundles

Frequent budget flyers should join the free loyalty programs. Southwest Rapid Rewards points stretch far, and Alaska’s Mileage Plan miles hold high value for partner awards. Spirit’s Free Spirit and Frontier Miles programs reward frequent short-haul travel. Even if you fly each airline once or twice a year, the welcome bonuses from co-branded credit cards can cover a round-trip or two—just avoid carrying a balance.

For the ultra-low-cost carriers, check whether a bundle (like Frontier’s WORKS or Spirit’s Flight Flex) makes sense. Adding a checked bag and seat selection individually can cost more than a bundled fare, especially if you value flexibility.

Packing to Avoid Fees

The single most effective way to keep a budget ticket cheap is to travel light. A small backpack that fits under the seat meets the free personal-item requirement on every airline covered here. If you need more, pay for bags during online check-in—never at the gate. Gate fees can be double or triple the pre-purchased price.

Getting to and from the Airports

No budget airfare saves money if you overspend reaching the terminal. Riverside sits roughly 15 miles from Ontario International and about 10 miles from San Bernardino International. Both airports are reachable via I-10, I-215, and local thoroughfares. Rideshare services like Uber and Lyft typically cost $25–$45 from central Riverside to ONT, less to SBD. Several shuttle companies and regional transit options, including Omnitrans and Metrolink connections, offer lower-cost alternatives if you aren’t in a rush.

Parking at ONT costs around $14–$25 per day, while SBD parking is often cheaper at $5–$10 per day. If you’ll be gone a week, it might be cheaper to arrange a ride or use a long-term off-site lot with a free shuttle. Always factor these ground expenses when comparing the true cost of a “cheap” flight.