If you've ever felt frozen on a plane (like this weekend) or caught a whiff of vanilla in a hotel lobby, or couldn't quite make a Wi-Fi connection in your room, congratulations: You may be a victim of the travel industry's latest manipulation tactics.

How's that? On a recent flight from Doha, Qatar, to Delhi, Mohd Rizwan found out.

Before takeoff, a crew member lowered the cabin temperature to what felt like 65 degrees. Passengers under the open vents started shivering. Then, shortly after takeoff, flight attendants came through the main cabin, selling blankets for about $10 apiece. 

"At one point, a crew member confided to me that this was a usual upsell path," says Rizwan, a frequent traveler who runs a travel agency in India. "It was a tactical environment change that enhanced sales."

Oh, and it worked. Passengers clamored for the covers like a Black Friday mob at Walmart.

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Welcome to the golden age of travel manipulation. Pushing overpriced minibars or rental car insurance is so passé. Airlines, hotels, and rental companies are subtly adjusting your physical environment—the air you breathe, the temperature you feel on your skin—to nudge you toward spending more. Their ally: cold, hard data that suggests you'll fall for it every time.

"Travel companies are using data to target customers when they’re more likely to decide with comfort or convenience at stake, like during boarding or booking," says Mario Matulich, president of Customer Management Practice. "Some travelers notice the prompts, but they rarely see the underlying strategy."

Until now.

So what are they doing? Glad you asked.

The arctic airliner is a classic move. It goes like this: You settle into your economy seat for a red-eye flight. But soon you're shivering uncontrollably because the AC is cranked up. And magically, the flight attendants appear, offering cozy (but pricey) blankets. You cave. 

"Airlines definitely drop the cabin temperature, especially on red-eyes," says frequent flier Jasmine Charbonier, who runs a marketing agency in Tampa.

Allen Chenault knows this game cold. As an HVAC contractor servicing Florida hotels and restaurants, he’s installed the systems that make the manipulation possible. 

"It’s absolutely real and systematic," Chenault says. "Hotels run lobbies two to three degrees warmer than guest surveys say people like. Why? To drive you toward the bar or restaurant where it’s cooler – and where you’ll spend."

He remembers one theme park restaurant client who wanted the merchandise area kept at a bone-chilling 65 degrees. 

"Make families so uncomfortable that they buy the overpriced hoodies right there," Chenault explains. "It’s intentional manipulation." 

Restaurants often drop dining room temps a few degrees during peak hours. "They want you slightly uncomfortable. You eat faster, they turn tables quicker. One client boosted dinner capacity by 20 percent just by going from 72 degrees to 68 degrees."

How about that signature scent when you check into your hotel? It’s probably intentional, too. Scent bypasses your logical brain, hitting emotions and memory directly.

Think back to your last resort visit. Remember that lavender scent that greeted you when you walked into the spa? Or the smell of freshly baked cookies when you checked in? A smell can drive you to buy food, upgrade your room, book a spa treatment or check out the gift shop.

"Smell manipulation is particularly insidious," explains Bambi Rattner, a therapist who studies environmental trauma. "It triggers emotional memories. Companies rewire your associations to drive purchases. You feel safe or 'excited' in a scented retail space, so you buy."

Tourism expert Jaleel Mankarathodi, who regularly visits resort hotels, has seen what scents can do. 

"I’ve personally seen a 15 to 20 percent increase in sales when these scent strategies are employed," he told me.

This nonsense with scents has gone far beyond travel. Gunnar Blakeway-Walen, the marketing manager for an apartment rental company based in Chicago, says scents drive his sales higher, too.  

"We pump vanilla and cedar scents through HVAC systems during property tours," he told me. "Vanilla triggers comfort and associations with home. Cedar suggests luxury and permanence." 

Of course, the manipulation extends to the digital world. 

Clayton Johnson, a hospitality industry marketer, recalls one client who strategically created Wi-Fi dead zones throughout the resort to force guests into the lobby and restaurant areas where connectivity was strong. 

"Guests stuck in these connection zones spent 47 percent more on food and beverages compared to those with in-room internet access," he recalls.

Online booking sites flash warnings: "Only two rooms left at this price!" or "Three people looking now!" But somehow, that "last" room is available tomorrow, raising suspicions about the accuracy of that warning.

Airlines excel at creating digital discomfort during booking. Lorena Basualdo, a luxury travel advisor, points to budget carriers. 

"They downplay the least expensive option – a middle seat, no bag – in grey or small font," she explains. "And they visually amplify expensive bundles. It creates loss aversion. You pay more just to avoid feeling like the deprived passenger."

Timing is an essential part of the manipulation. If you think the clock is running out, you're likely to make a snap decision to pay more — exactly what the airline wants. 

But timing is important in other ways. Because the manipulation doesn't work as well unless you're vulnerable. And that happens when you’re completely exhausted — another thing at which the travel industry excels.

Ever wonder why airlines aggressively push co-branded credit cards while you're wedged into the tiny economy class seats at the end of a grueling flight? The implied promise: If you collect enough miles, you can fly in premium economy next time, and maybe get an extra inch of legroom and a "free" bag of pretzels.

Rattner, the trauma therapist, says the tactics work because travelers are in a compromised mental state. 

"Your prefrontal cortex – responsible for logical decisions – goes offline with fatigue," she explains."You become the perfect target. Companies hijack your nervous system's autonomic stress responses. Discomfort makes you crave immediate relief, so you spend impulsively."

These manipulation tactics are barely legal. But you’re not powerless. Awareness is your first shield. 

"Spot manipulation by asking," advises Matulich, the customer service expert. "Is this solving a real need, or creating one? Is the urgency genuine? Does it enhance my experience, or just inflate my bill?"

Here’s your counter-manipulation toolkit:

Travel companies invest millions in understanding how to make you spend. They manipulate temperature, scent, light, sound, and digital interfaces because it works. 

Don't fall for it. Recognize when your environment is being engineered. Feel that artificial chill? Notice that sudden, perfect scent? See that flashing "last chance" warning? It's probably a manipulation.

Have you ever been manipulated on a flight or when you checked into a hotel? Our comments are open. We’ve switched email platforms, so you may have to sign in again to leave a comment. Here’s how.