Update: Some offers mentioned below are no longer available. View the current offers here.Want to see the latest flight deals as soon as they’re published? Follow The Points Guy on Facebook and Twitter, and subscribe to text message alerts from our deals feed, @tpg_alerts.Airfare deals are typically only available on limited dates. We recommend you use Google Flights to find dates to fly, then book through an online travel agency such as Orbitz or Expedia, which allows you to cancel flights without penalty by 11pm Eastern Time within one day of booking. However, if you’re using The Platinum Card® from American Express, you’ll need to book directly with the airline or through the Amex Travel portal to get 5x MR points. Remember: Fares may disappear quickly, so book right away and take advantage of Orbitz or Expedia’s courtesy cancellation if you’re unable to get the time away from work or family.Are you in need of a warm vacation? Better yet, how does a discount of 80% on one-way tickets sound? We’re seeing dirt-cheap prices (like sub-$200 nonstop round-trip fares) to Mexico, Peru and Colombia from major US cities.All fares are on Interjet and in the “Ultra Light” class, which means you’ll pay for checked bags and to pick a seat. But at these bargain prices, packing light may be worth it. And note that Interjet has some amazing legroom, a whole 34 inches of pitch on most seats on its Airbus A320s! The fares to Lima were first reported by Thrifty Traveler.The prices to Lima are an especially good deal, and can make that bucket-list trip to Machu Picchu all the more feasible — just be aware of the new restrictions when visiting the site.To search, head to Google Flights and enter your origin and destination cities. Scroll through the calendar function to find dates and prices that work for you. Finally, click through to book directly with the airline.Airline: InterjetRoutes: SFO/JFK/IAH/LAS/MCO/MIA/DFW/ORD/LAX to LIM/MEX/GDL/CUN/BOGCost: $180+ round-trip in economyTravel Dates: October – AprilPay With: The Platinum Card® from American Express (5x on airfare booked directly with the airline), Citi Prestige Card (5x on airfare), Citi Premier® Card, Chase Sapphire Reserve, American Express® Gold Card (3x on airfare when booked directly with the airline) or Chase Sapphire Preferred Card (2x on travel)Here are a few examples of what you can book:Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.San Francisco (SFO) to Guadalajara (GDL) for $180 round-trip nonstop:Houston (IAH) to Mexico City (MEX) for $187 round-trip nonstop:Las Vegas (LAS) to Cancun (CUN) for $194 round-trip:Orlando (MCO) to Mexico City (MEX) for $204 round-trip nonstop:New York (JFK) to Lima (LIM) for $219 round-trip:Miami (MIA) to Lima (LIM) for $219 round-trip:Dallas (DFW) to Lima (LIM) for $219 round-trip:Chicago (ORD) to Lima (LIM) for $219 round-trip:Los Angeles (LAX) to Lima (LIM) for $219 round-trip:San Antonio (SAT) to Bogota (BOG) for $228 round-trip:Maximize Your PurchaseDon’t forget to use a credit card that earns additional points on airfare purchases, such as The Platinum Card® from American Express (5x on flights booked directly with airlines or American Express Travel), Citi Prestige Card (5x on airfare), Chase Sapphire Reserve, American Express® Gold Card, Citi Premier® Card (3x on airfare) or the Chase Sapphire Preferred Card (2x on all travel purchases). Check out this post for more on maximizing airfare purchases.