Best Flights starting from $364
from$364first
Seattle (SEA)
Tue, Apr 7
One-way
Ontario (ONT)
—
from$364first
Seattle (SEA)
Wed, Apr 8
One-way
Ontario (ONT)
—
from$392first
Seattle (SEA)
Mon, Apr 6
One-way
Ontario (ONT)
—
from$394first
Seattle (SEA)
Thu, Apr 9
One-way
Ontario (ONT)
—
from$444first
Seattle (SEA)
Fri, Apr 3
One-way
Ontario (ONT)
—
from$484first
Seattle (SEA)
Sun, Apr 5
One-way
Ontario (ONT)
—
from$509first
Seattle (SEA)
Sat, Apr 4
One-way
Ontario (ONT)
—
Fields updated — click View Prices to search ↑
Other Destinations
Seattle (SEA) to Los Angeles (LAX) in April from $28
From $28
Seattle (SEA) to Las Vegas (LAS) in April from $97
From $97
Seattle (SEA) to Santa Ana (SNA) in April from $117
From $117
Seattle (SEA) to San Diego (SAN) in April from $139
From $139
Seattle (SEA) to Carmel (MRY) in April from $147
From $147
Seattle (SEA) to San Francisco (SFO) in April from $148
From $148
Flights from Other Cities
San Francisco (SFO) to Ontario (ONT) in April from $59
From $59
Denver (Any) to Ontario (ONT) in April from $69
From $69
Portland (PDX) to Ontario (ONT) in April from $89
From $89
San Francisco (SFO) to Ontario (ONT) in April from $133
From $133
San Antonio (SAT) to Ontario (ONT) in April from $135
From $135
Phoenix (PHX) to Ontario (ONT) in April from $137
From $137
✈️ Flight Guide: Seattle (SEA) → Ontario (ONT)
Complete travel information for your April journey
Departing from Seattle (SEA) FAQs
Several carriers operate nonstop service between Ontario International Airport (ONT) and Harry Reid International Airport (LAS), including Southwest Airlines, Spirit Airlines, and occasionally American and Delta depending on seasonal schedules. Nonstop flights typically run multiple times daily, giving travelers flexibility for day trips or weekend getaways. Book early to secure the lowest fares on nonstop ONT to LAS routes.
The typical scheduled flight time from Ontario International Airport (ONT) to Harry Reid International Airport (LAS) is about 1 hour to 1 hour 20 minutes for nonstop flights. Allow extra time for taxiing, potential delays, and boarding during peak travel periods like holidays and major conventions. Check live flight status before heading to ONT for the most accurate arrival estimates.
January is often a low-demand month after the holidays, so search flexible dates, set fare alerts, and compare budget carriers like Spirit and Southwest for the best ONT to LAS deals. Use primary keywords such as "cheap flights from Ontario International Airport" and consider booking 3–8 weeks in advance for the best combination of price and schedule. Sign up for airline newsletters and monitor flash sales to capture the lowest fares.
Ontario International Airport (ONT) offers rental cars, shared-ride shuttles, rideshare pickup zones, taxis, and local bus connections to nearby hubs like Los Angeles, Anaheim, and Riverside. Driving to downtown Los Angeles or Anaheim typically takes 40–70 minutes depending on traffic; many travelers choose rental cars or rideshares for flexibility. If you’re heading to theme parks in Anaheim, check shuttle partnerships and pre-book parking or car rentals during peak seasons.
December is a high-traffic travel month at Ontario International Airport (ONT) with extended security lines and earlier recommended arrival times; plan to arrive at least 90–120 minutes before domestic departures. Airlines may add extra flights or use larger aircraft for holiday demand, so keep an eye on your airline’s email alerts and ONT airport advisories for gate changes and parking updates. Consider offsite parking reservations or public transit to avoid last-minute delays during holiday weekends.
Budget airlines operating from Ontario International Airport (ONT), such as Spirit, typically charge for carry-on and checked bags and enforce strict size/weight limits. Review each carrier’s baggage policy before booking—paying for baggage during booking is almost always cheaper than at the gate. For SEO-friendly booking, search terms like "ONT baggage fees" or "Spirit baggage policy ONT" can help you compare charges quickly.
Arriving at Ontario (ONT) FAQs
Average one-way fares from Ontario International Airport (ONT) to Harry Reid International Airport (LAS) typically range from $39 to $150 depending on season, airline, and how far in advance you book. Budget carriers can offer sub-$50 promotional fares during off-peak months, while peak periods like conventions and holidays push prices higher. Use fare comparison tools and flexible dates to find the best ONT to LAS deals.
Harry Reid International Airport (LAS) is served by taxis, rideshares, shared shuttles, and public transit to the Las Vegas Strip and downtown. The Strip is typically a 10–20 minute drive depending on traffic and resort drop-off location; downtown Fremont Street is about 15–25 minutes. For budget travelers, shared shuttles and RTC public transit provide affordable transfers, while rideshares offer door-to-door convenience.
Yes—May hosts major events like Electric Daisy Carnival (EDC) and various conventions that can spike demand and raise fares to Harry Reid International Airport (LAS). Book early for May travel to Las Vegas and compare nearby airport options if attending large festivals. Use focused searches like "ONT to LAS May flights" to monitor price trends and pick the optimal booking window.
For short-haul flights from Ontario International Airport (ONT) to Harry Reid International Airport (LAS), Southwest Airlines is popular for free checked bags and flexible change policies, while Delta and American provide a more traditional full-service experience. Spirit and Frontier often have the lowest base fares but add fees for bags and seat assignments—factor in total trip cost when comparing. Prioritize loyalty benefits and baggage needs when choosing your carrier for ONT to LAS.
Harry Reid International Airport (LAS) is a convenient gateway to destinations like the Grand Canyon, Hoover Dam, Los Angeles, San Diego, and Zion National Park. Many travelers fly into LAS and then rent a car to explore nearby natural attractions or drive to Southern California cities for multi-destination itineraries. Consider multi-city booking for combined Las Vegas and Los Angeles trips to maximize savings and convenience.
During major conventions and trade shows, arrive at Harry Reid International Airport (LAS) at least 90–120 minutes before scheduled domestic departures to account for longer security lines and possible shuttle delays. Check your airline’s recommended arrival times and sign up for flight alerts; airports post real-time advisories when major events increase passenger volume. Consider TSA PreCheck to speed up security during busy convention periods.
1.0.2603.16
Events & Festivals Impacting ONT to LAS Travel — Plan Ahead
Major Las Vegas events—CES (January), Electric Daisy Carnival (May), large trade shows and major sporting events—drive up demand at Harry Reid International Airport (LAS) and affect ONT-LAS fares. When planning travel for event months, book flights and hotels months in advance, consider arriving a day early to avoid last-minute price surges, and search alternative midweek flights for savings. Nearby destination mentions include Los Angeles, Grand Canyon, Hoover Dam, San Diego, and Phoenix—each can be combined with Las Vegas in multi-city itineraries.
Best Time to Fly from Ontario International Airport (ONT) to Harry Reid International Airport (LAS)
The best time to fly from Ontario International Airport (ONT) to Harry Reid International Airport (LAS) for cheaper fares is typically January, February, and September—shoulder-season months when demand is lower. Book 3–8 weeks in advance for domestic short-haul routes to get competitive pricing; for event-driven travel (EDC, CES), book months ahead. For travel flexibility, search midweek flights and early-morning departures to maximize savings.
Direct vs Connecting Flights — Ontario International Airport (ONT) to Harry Reid International Airport (LAS)
For ONT to LAS, nonstop flights are plentiful and usually the best combination of time and convenience; direct nonstop service typically takes about an hour. Connecting flights may appear cheaper in rare cases but add travel time and the risk of missed connections. If your priority is saving money and nonstop options are expensive, weigh savings against added layover time, especially during busy months. Use keywords such as "nonstop ONT-LAS" and "cheap connecting flights Ontario to Las Vegas" when comparing options.
Airline Comparison for ONT to LAS — Price, Baggage & Experience
Southwest Airlines often provides the best overall value from Ontario International Airport (ONT) to Harry Reid International Airport (LAS) thanks to two free checked bags and flexible change policies. Spirit and Frontier compete on rock-bottom base fares but charge for carry-on and checked bags—total trip cost can rise quickly. American and Delta offer a more traditional airline experience with loyalty benefits and wider connection networks. For cheap flights prioritize total cost (fare + fees) and search using keywords like "ONT to LAS cheap airfare" and "Southwest ONT LAS baggage".
Seasonal Travel Tips for Ontario International Airport (ONT) to Harry Reid International Airport (LAS)
Winter (Dec–Feb): Expect holiday crowds and variable weather; arrive earlier and watch for promotions in January after New Year’s. Spring (Mar–May): Book early for conventions and festivals; pack layers as desert evenings can be cool. Summer (Jun–Aug): Peak season—reserve flights and rental cars well in advance and travel on weekdays to save. Fall (Sep–Nov): Best months for lower fares and comfortable weather—ideal for sightseeing and road trips to Grand Canyon or nearby Southern California cities. Always check baggage fees, TSA lines, and local event calendars when searching for cheap flights from Ontario International Airport (ONT) to Harry Reid International Airport (LAS).
Flight Time & Schedules — Ontario International Airport (ONT) to Harry Reid International Airport (LAS)
Nonstop flights from Ontario International Airport (ONT) to Harry Reid International Airport (LAS) usually take about 1 hour to 1 hour 20 minutes. Multiple daily flights operate year-round with higher frequency during summer and major Las Vegas events; early-morning and late-evening departures often offer lower fares. Check schedules for the month you plan to travel—weekday mid-morning flights can be less crowded, while evening flights are popular for weekend getaways. Use keywords like "ONT to LAS nonstop" and "flight duration ONT LAS" when searching for schedules.
Cheap Flights from Ontario International Airport (ONT) — Deals to Harry Reid International Airport (LAS)
To find cheap flights from Ontario International Airport (ONT) to Harry Reid International Airport (LAS), search with flexible dates, compare budget carriers like Spirit and Southwest, and set price alerts for the desired month. Primary keywords to include in searches are "cheap flights from ONT" and "ONT to LAS deals". Consider booking in January or September for lower average fares, and bundle hotel + flight deals if attending Las Vegas events. CTA: Compare prices now and sign up for fare alerts to capture the lowest ONT-LAS fares.