Submit feedbackSubmit feedbackComplete travel information for your September journey
September is a shoulder-season month for departures from Billings Logan International Airport (BIL), offering travelers lower rates and milder weather. If you’re flying BIL to Ontario International Airport (ONT), expect mostly one-stop itineraries through hubs such as Denver (DEN), Salt Lake City (SLC), or Phoenix (PHX). Nearby major destinations commonly accessed from BIL include Bozeman, Yellowstone National Park, Big Sky, Helena, and Cody — making Billings a convenient gateway for fall outdoor trips. For cheaper fares, book 3–6 weeks in advance and monitor price alerts; midweek flights and early-morning departures typically yield the best prices. CTA: Search and compare cheap flights from Billings Logan International Airport (BIL) to Ontario International Airport (ONT) now and lock in September savings.
To find cheap flights from Billings Logan International Airport (BIL) to Ontario International Airport (ONT) in September, search flexible dates and set price alerts on Google Flights, Skyscanner, or Kayak. Consider midweek departures and early-morning flights for lower fares, and compare one-stop options via Denver or Salt Lake City which can reduce cost. Book 3–6 weeks in advance for the best balance of price and availability during September shoulder season.
There are rarely nonstop commercial flights between Billings Logan International Airport (BIL) and Ontario International Airport (ONT); most itineraries in September involve one connection. Typical connecting hubs for this route include Denver (DEN), Salt Lake City (SLC), Phoenix (PHX), or Los Angeles (LAX). If you need nonstop travel, consider flying into larger nearby airports such as Los Angeles (LAX) or Bozeman (BZN) and adding ground travel.
Baggage allowances vary by carrier; basic economy fares often exclude checked bags while standard economy usually includes one carry-on and possibly one checked bag. In September, check each airline’s online policy before booking and consider purchasing baggage when you buy your ticket—this is usually cheaper than adding bags at the airport. Popular carriers on this route (United, American, Alaska, Delta) publish baggage rules on their websites and during booking.
Billings Logan International Airport (BIL) offers short-term and long-term parking, airport shuttles, rental cars, taxis, and rideshare pickup zones. In September, demand is moderate—reserve rental cars in advance for the best rates, and use official airport lots for long-term parking to avoid off-site fees. Check the BIL official website for current parking rates and terminal pickup rules.
As of September travel guidance, most domestic U.S. flights have no federal pre-departure testing requirement, but local or airline-level policies can change. Check both the Billings Logan International Airport (BIL) site and your airline before departure for mask, testing, and vaccination advisories. For international connections or carrier-specific rules, review airline notifications and CDC guidance.
Yes—September is excellent for travel to Yellowstone, Big Sky, and other Montana outdoor destinations because crowds thin after Labor Day and fall colors begin appearing. Flights from Billings Logan International Airport (BIL) can be more affordable in early to mid-September compared to peak summer, and cooler temperatures make hiking and sightseeing pleasant. Book lodging and national park permits early if you plan multi-day excursions.
Arrival traffic at Ontario International Airport (ONT) in September tends to be moderate, with favorable conditions for travelers connecting to Los Angeles, Anaheim, Riverside, and Palm Springs. ONT is a practical alternative to LAX for Southern California travel—expect shorter lines for rental cars and easier parking. For the best arrival experience, pre-book a rental car or rideshare, confirm Metrolink schedules for rail options to downtown LA, and factor usual Southern California traffic patterns into your onward travel time. CTA: Book your connecting transport from Ontario International Airport (ONT) ahead of September arrival to save time and money.
From Ontario International Airport (ONT), you can use rental cars, rideshares, airport shuttles, or Metrolink trains to reach Los Angeles, Anaheim, and other Southern California destinations. In September, traffic is generally lighter than summer peak months but still plan for 60–90 minutes to central Los Angeles depending on time of day. Consider Metrolink (ONT station) for a reliable public transit option to downtown LA and connections to Orange County.
Ontario International Airport (ONT) has a compact terminal layout with clearly marked arrivals and baggage claim areas; expect routine TSA and customs (for international connections) procedures. In September, the airport handles steady domestic traffic with efficient security lines—still, arrive at least 90 minutes before domestic flights and 2 hours for connections to account for check-in and bag drop. Check airline notifications for any temporary gate changes or construction updates.
September often brings reduced fares to Ontario International Airport (ONT) from northern departure points like Billings Logan International Airport (BIL) due to shoulder-season demand. Use fare comparison tools and flexible-date searches to find savings; one-stop itineraries via Denver or Phoenix commonly offer the lowest prices. Sign up for airline newsletters and set fare alerts to capture limited-time deals landing in September.
Ontario International Airport (ONT) serves the Inland Empire and is a convenient gateway to Los Angeles, Anaheim (Disneyland), Riverside, San Bernardino, Palm Springs, and Orange County. In September, these destinations enjoy milder temperatures and fewer tourists than summer, making ONT a cost-effective alternative to LAX for Southern California travel. Renting a car at ONT is simple and often cheaper than at larger airports.
For September arrivals at Ontario International Airport (ONT), review airline and local health guidance for any mask or testing updates—domestic travel generally has no federal testing requirement but policies can vary. Check ONT’s official website and your airline communications shortly before departure, and carry digital or printed proof of vaccination/negative tests if your itinerary includes international legs. Local health departments (e.g., San Bernardino County) post advisories that could affect travel services.
September pairs well with cultural and outdoor events around both airports. From Billings Logan International Airport (BIL), travelers can time trips to harvest festivals, Montana scenic drives, fall foliage near Yellowstone, and mountain trail races. Arrivals at Ontario International Airport (ONT) open access to Southern California festivals, food and wine harvest events in nearby vineyards, and sports events in Los Angeles and Anaheim. These events make September a compelling month to combine Montana outdoor adventures with Southern California urban and cultural activities. CTA: Check local event calendars and book your September flights to align with festivals or outdoor events near BIL and ONT.
September is often one of the best months to fly between Billings Logan International Airport (BIL) and Ontario International Airport (ONT). The shoulder season brings fewer tourists, pleasant weather in both regions, and competitive airfare as airlines adjust post-summer schedules. For lowest fares and easier airport experiences, book midweek flights and avoid holiday weekends. CTA: Search September calendars now to find the sweet spot for both price and weather on your BIL → ONT trip.
Most travelers from Billings Logan International Airport (BIL) to Ontario International Airport (ONT) will book a connecting flight in September, as nonstop options are uncommon. Connecting flights usually cost less and offer more schedule flexibility, but add the risk of missed connections and longer travel time. If speed and simplicity are priorities, aim for short, single-stop itineraries with at least a 60–90 minute connection; if cost-savings are the main goal, allow longer layovers or open-jaw itineraries through hubs such as Denver (DEN) or Phoenix (PHX). CTA: Compare direct and connecting options now to decide which trade-offs you prefer for September travel.
Major carriers on the Billings Logan International Airport (BIL) to Ontario International Airport (ONT) corridor include United, Delta, American, and Alaska—often via partner regional carriers. United commonly routes via Denver (DEN), Delta via Salt Lake City (SLC), and American via Phoenix (PHX) or Dallas (DFW). Compare fare classes: basic economy can be cheapest but limits seat selection and baggage, while main cabin fares include a carry-on and sometimes a checked bag. Loyalty program benefits, change flexibility, and on-time performance should factor into your decision for September travel. CTA: Compare carriers and book the best-value flight from BIL to ONT for your September schedule.
Packing and planning for a September trip from Billings Logan International Airport (BIL) to Ontario International Airport (ONT) means preparing for diverse climates: expect cool mornings (40s–50s °F) in Montana and warm to hot afternoons (60s–90s °F) in Southern California. Layer clothing for flexibility, bring sunscreen for ONT-area outdoor time, and reserve rental cars and airport parking in advance to lock in better rates. For seamless travel, check flight status the day before your trip, enroll in airline alerts, and arrive at BIL with enough time for parking, check-in, and security lines. CTA: Pack smart and confirm reservations now to make your September itinerary between Billings Logan International Airport (BIL) and Ontario International Airport (ONT) effortless.
Typical door-to-door flight time from Billings Logan International Airport (BIL) to Ontario International Airport (ONT) ranges from about 4.5 to 7 hours including one connection, depending on layover duration. There are currently few—if any—nonstop options, so common connections are through hubs such as Denver (DEN), Salt Lake City (SLC), Phoenix (PHX), or Los Angeles (LAX). In September, airlines often maintain daily service with more frequency on peak travel days; morning and late-afternoon windows tend to offer the most options. CTA: Check live schedules and choose the best one-stop itinerary from BIL to ONT for your September trip.
To secure cheap flights from Billings Logan International Airport (BIL) to Ontario International Airport (ONT) in September, use a mix of flexible-date searches and fare alerts. Primary tips include booking 3–6 weeks ahead, flying midweek (Tuesday–Thursday), and considering one-stop routings via Denver or Phoenix which often lower fares. Secondary strategies include checking nearby airports (e.g., Bozeman BZN or Los Angeles LAX) for price differentials and using incognito searches to monitor price fluctuations. CTA: Set price alerts and compare carriers now to capture September discounts on the BIL → ONT route.
