Chicago is a crossroads for budget-minded travelers, offering a surprisingly wide selection of low-cost carriers that can whisk you across the United States, to the Caribbean, or even to Europe without draining your savings. Whether you’re flying out of O’Hare International Airport (ORD) or Chicago Midway International Airport (MDW), understanding the mix of airlines, fees, and booking strategies can mean the difference between a cheap getaway and a budget bust. This guide breaks down every major budget airline operating in Chicago in 2025, plus how to find the lowest fares, avoid hidden costs, and make the most of your trip.

Who’s Flying Cheap: Budget Airlines at Chicago Airports

Spirit Airlines – Ultra-Low Base Fares from O’Hare

Few carriers stir up as much debate among frugal fliers as Spirit Airlines. Operating exclusively from O’Hare, Spirit is the king of the unbelievably low base fare. You might spot tickets to Las Vegas, Orlando, or Fort Lauderdale for $20 or $30 one-way—but that price covers only a personal item that fits under the seat in front of you. Everything else comes à la carte: carry-on bags, checked luggage, seat selection, even a boarding pass printed at the airport.

That said, if you travel light and buy your add-ons early (ideally at booking), Spirit can be a serious money saver. Their Big Front Seat offers extra legroom without a business-class price, and the Spirit Saver$ Club membership delivers discounts on bags, seats, and exclusive sale access for frequent customers. Popular domestic routes from O’Hare include Los Angeles, Dallas, Myrtle Beach, and Tampa, with a few international flights to the Caribbean and Latin America sprinkled into the schedule.

Frontier Airlines – Discount Flights Out of Midway

Frontier Airlines dominates the budget scene at Chicago Midway with a similar ultra-low-cost model. Base fares can dip as low as $19 during flash sales, and the green-tailed planes connect Chicago to Denver, Orlando, Phoenix, Cancún, and Punta Cana, among dozens of other cities. The “Discount Den” membership is worth a look if you plan to fly Frontier a few times a year: it unlocks kids-fly-free promotions and reduced rates on bags and seats.

Like Spirit, Frontier charges for everything beyond a small personal item. A standard carry-on bag typically runs $30–$60 each way if purchased at the time of booking, and significantly more at the gate. The key is to decide exactly what you need before you hit the “buy” button and compare the full bundled price against other airlines. Frontier’s “The Works” package bundles a carry-on, checked bag, seat assignment, and no change fees, which can sometimes level the playing field with more inclusive carriers.

Southwest Airlines – The All-Inclusive Low-Cost Option

While Southwest Airlines often gets lumped in with traditional carriers, it remains one of the best value airlines for Chicago travelers who want predictability and flexibility. Operating a massive hub at Midway, Southwest covers virtually every corner of the United States and several warm-weather international spots like Cancún, Montego Bay, and San José del Cabo. Two free checked bags, no change fees, and no seat selection charges give Southwest a clear edge over Spirit and Frontier for anyone traveling with more than a backpack.

Fares are structured into “Wanna Get Away,” “Anytime,” and “Business Select” tiers, with the first offering the lowest prices. Southwest’s Rapid Rewards program is exceptionally user-friendly, and the Companion Pass—earned after a set number of flights or points—allows a designated companion to fly with you for just the taxes on every flight you take. It’s a loyalty perk that makes Southwest hard to beat for couples or frequent Midway travelers.

International Budget Carriers Expanding from Chicago

The transatlantic budget revolution has finally reached the Windy City. Norse Atlantic Airways now flies from O’Hare to London Gatwick and Paris Charles de Gaulle, offering eye-popping one-way fares that can drop below $150 in the off-peak season. The catch? Everything from a meal to a full-size carry-on is an extra. Still, for a long weekend in Europe with only a personal item, the math works out dramatically cheaper than traditional transatlantic carriers.

PLAY Airlines has also entered the scene with connections from O’Hare to Reykjavík and onward to popular European cities such as Dublin, Berlin, and Barcelona. Their stopover program lets you spend up to 10 days in Iceland at no extra airfare, effectively turning one trip into two. Both Norse Atlantic and PLAY stick to the unbundled model, so the total cost should always be calculated with the bags and services you actually need.

How to Get the Lowest Fares from Chicago

Use Flight Search Tools Like a Pro

The difference between an average fare and a steal often comes down to how you search. Google Flights is the gold standard for visualizing prices across an entire month. Its calendar view immediately shows which departure dates are cheapest, and the “track prices” feature sends a notification the moment fares drop for your selected route.

Beyond Google, apps like Hopper use historical data to predict whether you should book now or wait. Kayak Explore lets you answer the question “Where can I go for under $100?” by displaying destinations within your budget on a map. Setting multiple alerts across different platforms—and for both round-trip and one-way itineraries—ensures you catch flash sales that often vanish within hours.

Always Compare Booking Channels

Skyscanner, Momondo, and other online travel agents (OTAs) do the heavy lifting of comparing dozens of airlines at once, but they don’t always show the complete picture. Sometimes an airline’s own site offers members-only pricing, payment plans (United’s fare lock, for instance), or bundle deals that third-party platforms can’t replicate. The best approach is a two-step process: locate a promising fare on an OTA, then pull up that same itinerary on the airline’s official website to see if the price drops or if a more generous fare class appears.

Booking direct also makes it easier to handle changes or cancellations. When things go wrong—a missed connection or weather delay—going through the airline’s customer service instead of a middleman almost always yields faster resolutions. And if you’re building loyalty points toward a future free flight, booking direct is the only route that counts.

Unmasking Airline Fees and Hidden Costs

Ultra-low-cost carriers make their money on optional extras, and the final price can easily double the original ticket amount if you’re not careful. Before clicking “purchase,” run through a mental checklist of what you’ll actually need:

  • Personal item vs. carry-on: Spirit and Frontier include only a small bag that fits under the seat. A full-size carry-on costs extra, and that fee jumps significantly at the airport.
  • Checked bags: Pre-paying online can save $10–$25 per bag compared to paying at the counter.
  • Seat selection: Unless you don’t mind a middle seat, expect to pay $5–$50 per segment to choose your spot. Families may want to budget for this.
  • Boarding pass printing: Printing a pass at the airport on Spirit costs extra; always check in online and use a mobile boarding pass.

A quick side-by-side comparison often reveals that Southwest’s “all-in” ticket ends up cheaper than Spirit’s base fare plus baggage and seat fees—or vice versa, depending on your travel style. The key is to compare the fully loaded price, not the eye-catching teaser rate.

Timing Your Purchase and Travel Dates

Broadly speaking, domestic flights from Chicago hit their lowest price point 1–3 months before departure. For international trips, especially on Norse Atlantic or PLAY, booking 2–6 months out tends to capture sale fares without risking skyrocketing last-minute prices. Flying on Tuesdays, Wednesdays, or Saturdays can shave 10–20% off the fare compared to peak Friday and Sunday travel.

Seasonality matters profoundly in Chicago. Late fall (after the summer rush and before Thanksgiving) and the January-February window (excluding President’s Day weekend) are consistently the cheapest times to fly. Midwestern winter weather can cause delays, but the savings often justify the risk if you leave padding in your itinerary. Avoiding major holidays and spring break weeks is a simple rule that reliably protects your wallet.

Top Budget-Friendly Destinations from Chicago

Domestic Hotspots

Budget airlines connect Chicago to nearly every popular American getaway, often with multiple daily flights so you can pick a time and price that works. Here’s a cheat sheet of the most popular domestic runs and what you can expect to pay when you plan ahead:

  • Las Vegas: Spirit, Frontier, and Southwest all compete fiercely. One-way fares frequently fall between $39 and $69.
  • Orlando: A family favorite served by Spirit, Frontier, and Southwest. Look for $49–$79 each way outside of school breaks.
  • Denver: Frontier and Southwest dominate this route, with United basic economy sometimes sneaking in. Fares as low as $59 one-way.
  • Fort Lauderdale/Miami: All three budget giants fly to South Florida, making it a price war corridor. Expect $59–$89 one-way.
  • Phoenix: Frontier and Southwest battle it out here, with winter escapes from the Chicago cold usually running $69–$109.
  • Dallas-Fort Worth: Spirit and Frontier provide nonstop options that often undercut the major network carriers by half.

International Bargains Under $300 Round Trip

International travel on a shoestring used to be a fantasy, but not anymore. From Chicago, these routes consistently deliver jaw-dropping prices when booked during sales:

  • Cancún, Mexico: Frontier and Spirit offer round trips dipping to $150–$250, putting a beach vacation within reach for a long weekend.
  • Punta Cana, Dominican Republic: Frontier’s direct flights can be had for $200–$280 round trip, with little competition on the route.
  • Reykjavík, Iceland: PLAY Airlines often promotes fares around $250–$350 round trip. The stopover program adds even more value.
  • London/Paris: Norse Atlantic regularly releases $300–$400 round trips to London Gatwick or Paris CDG, though sub-$250 deals pop up in the slowest travel periods.

Keep in mind these rock-bottom international fares typically cover only a personal item, so a standard backpack with a few changes of clothes is the strategy that makes them truly cheap.

Maximize Value with Stopover Programs

If you’re the type who likes to squeeze two destinations out of one ticket, PLAY’s Iceland stopover deserves a spot in your plans. You can spend up to 10 days exploring Reykjavík, the Golden Circle, or the Blue Lagoon before continuing to mainland Europe—all without paying more for the flight. It transforms a simple trip into a mini tour of Iceland and a European city break for roughly the price of a domestic cross-country flight.

Airport Smarts: Navigating O’Hare and Midway on a Budget

O’Hare vs. Midway: Which Saves You More?

Choosing the right airport can influence your total travel cost just as much as the airline selection. Midway (MDW) is the undisputed home of low-cost carriers in Chicago, with Southwest and Frontier running high-frequency schedules to dozens of cities. Because Midway is smaller and closer to downtown, ground transportation—whether by ride-share or public transit—often takes less time and sometimes costs slightly less.

O’Hare (ORD), while dominated by legacy carriers, is hardly devoid of budget options. Spirit operates a robust domestic network from O’Hare, and the addition of Norse Atlantic and PLAY gives ORD the edge for bargain transatlantic flights. Parking at O’Hare’s economy lots tends to cost a few dollars more per day than at Midway, though both airports hover around $15–$22 daily for on-site economy parking. If you’re driving to the airport, factor that into the final tally.

Parking, Public Transit, and Ride Shares

The Chicago Transit Authority (CTA) provides a dirt-cheap connection to both airports. The Blue Line ends right at O’Hare, while the Orange Line terminates at Midway. A one-way fare costs $2.50 (from most stations; a $5 surcharge applies when boarding at O’Hare) and runs around the clock, albeit with reduced frequency late at night. For those who prefer a car, booking parking in advance through SpotHero or the airport’s official site can lock in lower daily rates at official economy lots and nearby off-airport facilities.

Ride-share services are convenient but prone to surge pricing during peak travel hours and bad weather. A ride from downtown to O’Hare typically runs $30–$50, while Midway comes in a bit below that. If you’re traveling with a group and splitting the fare, the per-person cost often rivals public transit, making it a reasonable splurge. Just be aware that both airports have designated pickup zones that can add a few minutes to your walk from baggage claim.

Budget Hotels and Park-Sleep-Fly Packages

For early-morning departures or late-night arrivals, staying at an airport hotel packaged with long-term parking can be cheaper than booking a hotel and parking separately. Around O’Hare, the Super 8 by Wyndham Chicago O’Hare Airport, Hilton Chicago O’Hare Airport, and DoubleTree by Hilton Chicago O’Hare Airport-Rosemont all offer park-sleep-fly rates that often beat the cost of a week’s parking at an economy lot. Expect to pay $100–$160 per night including up to 7 or 14 days of parking.

Midway’s hotel scene is more modest, but Sleep Inn Midway Airport and Holiday Inn Express & Suites Chicago-Midway Airport extend similar bundled deals. Staying at these properties also eliminates the early-morning scramble, a bonus for anyone who dislikes navigating pre-dawn traffic on the Kennedy or Stevenson expressways.

If Chicago Is Your Destination: Budget Tips for Visitors

Many travelers touch down in Chicago on one of these budget airlines and immediately wonder how to enjoy the city without undoing all the money saved on the flight. The good news is that the Windy City is flush with free and cheap attractions, reliable public transit, and wallet-friendly stays.

Affordable Accommodations Near the Airports and Downtown

The same airport hotels that cater to departing passengers also serve those landing in Chicago and looking for a lower price point than downtown high-rises. If you’re willing to ride the train into the city each day, staying near ORD or MDW can save $50–$80 nightly compared to comparable Loop or River North properties.

For a more immersive experience, hostels like HI Chicago in the South Loop or the stylish Freehand Chicago in River North offer dorm beds and private rooms at a fraction of traditional hotel rates. Short-term rental platforms also abound in neighborhoods like Logan Square and Pilsen, where you can live like a local and save on dining by shopping at neighborhood grocery stores.

Free and Nearly Free Attractions

You don’t need a fat wallet to soak up Chicago’s culture. Wander through Millennium Park to see Cloud Gate (The Bean) and the ever-changing art installations—all completely free. The Lincoln Park Zoo, one of the country’s oldest zoos, charges no admission and offers skyline views along with animal exhibits.

Museums can be pricey, but timing is everything. The Art Institute of Chicago offers free admission to Illinois residents on Thursday evenings, and many institutions have designated free days for all visitors listed on their websites. The Chicago Riverwalk, the 606 elevated trail, and the beachfront along Lake Michigan provide full afternoons of entertainment without spending a dime.

Getting Around Without a Car

If you’re staying in the city, skip the rental car. A CTA unlimited-ride pass costs $5 per day and gives you unlimited bus and train access, easily connecting both airports to downtown in under an hour. The ‘L’ system also reaches most neighborhoods you’d want to explore, from Wrigleyville to Hyde Park.

Bike and scooter rentals fill in the gaps during warmer months, and Divvy bikes have stations near many tourist hubs. Ride-share services are available for late-night returns to the airport, but as always, check the price before confirming—it might be cheaper to take the train one more time and treat yourself to a deep-dish pizza instead.

Chicago’s budget airline ecosystem makes it possible to see the country and beyond without overspending on airfare. By matching the right carrier to your travel style, monitoring fares with the right tools, and always calculating the fully loaded price, you can turn a tight budget into a packed itinerary. The flights are there—grab them before the next sale ends.