Best Flights starting from $118
from$118economy
Denver (Any)
Tue, Apr 28
Roundtrip
Ontario (ONT)
Mon, May 4
from$118economy
Denver (Any)
Thu, Apr 30
Roundtrip
Ontario (ONT)
Wed, May 6
from$154economy
Denver (Any)
Wed, Apr 29
Roundtrip
Ontario (ONT)
Tue, May 5
from$165economy
Denver (Any)
Tue, Apr 28
Roundtrip
Ontario (ONT)
Tue, May 5
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Other Options for This Route
Other Destinations
Denver (Any) to Seattle (Any) in April from $61
From $61
Denver (Any) to Miami (MIA) in April from $79
From $79
Denver (Any) to Las Vegas (Any) in April from $111
From $111
Denver (Any) to Boston (BOS) in April from $115
From $115
Denver (Any) to Atlanta (Any) in April from $121
From $121
Denver (Any) to Nashville (BNA) in April from $134
From $134
Flights from Other Cities
Las Vegas (LAS) to Ontario (ONT) in April from $56
From $56
San Francisco (SFO) to Ontario (ONT) in April from $59
From $59
Portland (PDX) to Ontario (ONT) in April from $89
From $89
Las Vegas (LAS) to Ontario (ONT) in April from $125
From $125
Las Vegas (Any) to Ontario (ONT) in April from $125
From $125
San Francisco (SFO) to Ontario (ONT) in April from $133
From $133
✈️ Flight Guide: Denver (Any) → Ontario (ONT)
Complete travel information for your April journey
April travel from Denver (All Airports) (DENA) to Ontario International Airport (ONT) balances spring weather in Colorado with warm Southern California temperatures. Travelers often combine a trip to Ontario, Anaheim, Los Angeles, or Riverside with outdoor activities. Expect variable spring conditions at origin and mild, sunny conditions at destination.
Departing from Denver (Any) FAQs
In April, you can expect multiple daily options on major carriers between Denver (All Airports) (DENA) and Ontario International Airport (ONT), including a mix of nonstop and one-stop schedules. Frequency increases on peak travel days (Thursdays–Sundays) because of spring travel and regional events. Check carrier timetables for the most up-to-date frequency and book early for the best fares.
Nonstop flights between Denver (All Airports) (DENA) and Ontario International Airport (ONT) usually take about 2 hours 15 minutes to 2 hours 30 minutes of airtime. Total door-to-door time will be longer once you add ground transport, security lines, and potential weather delays common for spring in the Rockies. Always check the scheduled block time on your carrier’s itinerary.
April is a transitional month in Colorado; spring storms and late snowfall can occasionally cause delays at Denver (All Airports) (DENA). Expect variable conditions—clear warm days mixed with windy or snowy periods—so build buffer time for connections and monitor airline alerts. Sign up for carrier notifications and consult FAA/DEN operational notices before travel.
For early flights from Denver (All Airports) (DENA), stay near downtown Denver, Aurora, or areas along I-70 for easy access. Transit options include RTD A Line (from Denver International Airport when using DEN), rideshares, airport shuttles, and hotel transfer services. If using remote airports included under 'All Airports', confirm which terminal your carrier uses and allow extra time for traffic.
Yes, April fares between Denver (All Airports) (DENA) and Ontario International Airport (ONT) are often lower compared with peak summer months, though prices can spike around spring break and event weekends like Coachella in nearby Southern California. Use fare alerts, book 3–8 weeks in advance for April travel, and compare flexible dates to secure the best airfare.
Most airlines allow ski and snowboard bags as checked items for flights departing Denver (All Airports) (DENA), but policies vary by carrier—expect additional oversized baggage fees. April is often ski-transition season, so confirm size/fee rules with your airline and arrive early to manage oversized luggage drop-off smoothly.
April arrivals to Ontario International Airport (ONT) are ideal for enjoying Southern California spring weather, visiting Anaheim theme parks, exploring Los Angeles attractions, or driving to Palm Springs for festival weekends. Plan ahead for festival traffic and book ground transport early.
Arriving at Ontario (ONT) FAQs
Ontario International Airport (ONT) offers multiple ground transportation options including rental cars, rideshares (Uber/Lyft), local shuttles, taxis, and regional transit connections like Omnitrans and Metrolink nearby. April is typically busy on weekends because of events, so pre-book shuttles or rental cars when possible and expect slightly higher demand.
For domestic flights arriving at Ontario International Airport (ONT), standard domestic baggage claim procedures apply—collect checked luggage at the designated carousel for your flight. If your itinerary includes international connections, follow signage for customs and border protection; otherwise, domestic arrivals typically do not require customs clearance.
From Ontario International Airport (ONT), the fastest options to Anaheim or Los Angeles are rental car or rideshare; driving time to Anaheim is roughly 30–45 minutes and to downtown Los Angeles about 40–60 minutes without heavy traffic. For budget travelers, regional bus services and Metrolink trains connect ONT with broader Southern California transit networks—confirm schedules in April for weekend event surges.
Yes, April arrivals at Ontario International Airport (ONT) can experience increased traffic and demand during major regional festivals such as Coachella and Stagecoach, which draw visitors to nearby Palm Springs and Indio. Expect heavier rideshare wait times and limited rental car inventory around festival weekends; reserve transportation and lodging well in advance.
April typically brings mild to warm weather at Ontario International Airport (ONT), with daytime highs often in the mid-60s to low-80s°F (18–28°C) and cool evenings. Rain is uncommon but possible; pack a light layer for early mornings and evenings and expect pleasant conditions for outdoor activities.
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April Events & Festivals Near ONT and DENA — Plan Around Coachella and Spring Activities
Major April events that can influence travel on the DENA→ONT route include Coachella and Stagecoach festivals (near Palm Springs/Indio), Spring attractions in Anaheim (theme park events), and various spring break activities drawing visitors to Southern California. In Denver, April sees spring festivals, outdoor recreation ramping up in mountain towns like Vail and Aspen, and arts events downtown. Travel tip: if your April itinerary overlaps festival weekends, book flights and rentals months in advance; consider flying mid-week to avoid peak crowds.
Best Time to Fly DENA → ONT in April
For April travel from Denver (All Airports) (DENA) to Ontario International Airport (ONT), the best time to fly for lower fares and lighter crowds is mid-week (Tuesday–Wednesday) with departures in the mid-morning or late evening. Avoid weekend festival dates and peak spring break weeks when fares and demand tend to spike. If you prioritize punctuality, early morning departures often reduce the risk of cascading delays caused by prior-day weather or heavy airport traffic.
Direct vs. Connecting Flights: Denver (All Airports) (DENA) to Ontario International Airport (ONT)
Nonstop flights between Denver (All Airports) (DENA) and Ontario International Airport (ONT) offer the fastest door-to-door time (approximately 2h15m) and minimal connection risk—ideal for short trips and business travelers. Connecting flights can be significantly cheaper, especially on less popular days, but include layover risk; common connection cities include Phoenix (PHX) and Salt Lake City (SLC). For April travel, weigh cost savings against potential spring weather disruptions in Denver; if you have tight schedules or group travel, prefer nonstop when available.
Airline Comparison for DENA → ONT in April
Southwest: Often competitive on price with two free checked bags and flexible change policies—good for families and those checking luggage. United: Provides a broader network for one-stop connections via hubs like SFO or DEN; fee structures vary by fare class. American: Good for loyalty members and connections through PHX or DFW, with seat options across fare classes. Alaska: Strong West Coast presence and competitive fares with convenient connections. For April travel, choose based on your priorities: lowest base fare (Southwest/discount carriers), schedule convenience (nonstop vs best-connection), or loyalty benefits (legacy carriers). CTA: Compare fares and baggage rules across carriers before booking to avoid unexpected fees.
Seasonal Travel Tips for April — Packing, Weather, and Transportation for DENA to ONT
Pack layers for fluctuations: light jackets for Ontario evenings and warm daytime wear; include a compact umbrella just in case. For Denver departures in April, expect potential leftover snow at higher elevations—bring sturdy shoes if you plan mountain excursions. Reserve rental cars early, particularly if traveling to Palm Springs or Anaheim during festival weekends; consider buying refundable tickets or travel insurance if your trip aligns with unpredictable spring weather. CTA: Prepare a flexible itinerary and double-check your carrier’s change/cancellation policies before booking April travel.
Flight Time & Typical Schedules: Denver (All Airports) (DENA) → Ontario International Airport (ONT)
Nonstop flights from Denver (All Airports) (DENA) to Ontario International Airport (ONT) typically have scheduled block times of about 2 hours 15 minutes to 2 hours 30 minutes. In April, most carriers schedule more flights on Thursdays through Sundays; Tuesdays and Wednesdays often offer lower fares and fewer flights. Sample schedule patterns include morning departures (6:00–9:00 AM local), midday flights (11:00 AM–2:00 PM), and evening options (4:00–8:00 PM). For connecting itineraries, common layover hubs are Phoenix (PHX), Salt Lake City (SLC), and Los Angeles (LAX); expect total travel times of 4–6+ hours depending on connection windows.
How to Find Cheap Flights from Denver (All Airports) (DENA) to Ontario International Airport (ONT) in April
To find cheap flights from Denver (All Airports) (DENA) to Ontario International Airport (ONT) in April, search mid-week for departures and returns, and set fare alerts 3–8 weeks in advance. Use flexible-date searches and consider one-stop connections via Phoenix (PHX) or Salt Lake City (SLC) to lower fares. Clear keyword tactics include searching for 'cheap flights Denver to Ontario April', monitoring 'one-way fares DENA to ONT', and booking on Tuesdays or Wednesdays if a sale drops. Consider budget carriers for basic fares but factor in bag fees. CTA: Set price alerts now and compare nonstop vs connecting flights to find the best April deal.