One-Way Flights Under $100

Routes That Regularly Go Under $100

One-way flights under $100 aren't unicorns — they happen every day on the right routes. The key is knowing where to look and when to book. Here's the breakdown.

The Budget Airline Corridors

Spirit and Frontier run the cheapest domestic one-way fares, period. Their best routes regularly hit $19-49:

• Chicago (ORD) → Las Vegas — Frontier and Spirit compete hard. $29-59 one-way is common.
• New York (LGA/EWR) → Fort Lauderdale — Spirit's bread and butter. $35-65 year-round.
• Atlanta → New York — Spirit, Frontier, and even Delta Basic Economy go under $80.
• Dallas → Denver — Frontier hub to hub. $29-49 fares drop weekly.
• Miami/Orlando → Chicago — Multiple budget carriers, $40-75 most weeks.

Southwest also plays here, though their base fares start higher ($60-100). The advantage: two free carry-on bags, so your total cost is often lower than Spirit's $25 fare plus $45 in bag fees.

The Cheapest Airports to Fly From

Your home airport matters more than your destination. These hubs consistently have the most sub-$100 options:

• Fort Lauderdale (FLL) — Spirit's biggest hub. More sub-$100 routes than any other US airport.
• Denver (DEN) — Frontier's home base. Cheap fares to both coasts.
• Las Vegas (LAS) — Every budget carrier competes here. Fares from the West Coast regularly hit $29-49.
• Orlando (MCO) — Spirit and Frontier fight for tourist traffic, pushing fares down.
• Chicago (ORD/MDW) — Spirit at O'Hare, Southwest at Midway. Budget options in every direction.

If you don't live near a budget hub, consider a positioning flight. A $30 flight to Fort Lauderdale plus a $50 Spirit fare from FLL still keeps you under $100 total.

International Under $100 — It Happens

Sub-$100 international one-ways are rare but real:

• PLAY Airlines to Iceland from Baltimore/Boston — $99 sales happen 2-3 times per year
• US → Mexico/Caribbean — Spirit to Cancun or Frontier to San Juan occasionally drops to $79-99
• Intra-Europe on Ryanair — If you're already in Europe, $20-40 fares between cities are routine

When Sub-$100 Fares Are Most Common

Timing matters. The cheapest domestic fares cluster in January-February (post-holiday slump) and September-October (back-to-school, before holidays). Avoid summer and December — fares jump 30-50%.

Day of week matters too: Tuesday and Wednesday flights are 13% cheaper on average. Budget carriers also drop flash sales midweek — follow our alerts to catch them.

How to Catch These Deals

Sub-$100 deals go fast — often selling out in hours. Your best bet:

• Set Google Flights price alerts on your top routes
• Sign up for SkipFare alerts — we track budget fares daily
• Be flexible on dates (shifting 1-2 days can mean the difference between $39 and $139)
• Check nearby airports (Newark vs JFK, Fort Lauderdale vs Miami, Burbank vs LAX)
• Book fast — don't comparison-shop for 3 days on a $39 fare. It won't be there.

For more strategies, check our complete guide to finding flights under $100.