An Exchange Rate Loophole That Can Pay for Your Flight to Mexico City

Update: While exchange rates have changed since I wrote this post, as of May 2018, when we were last at Mexico City Airport, this exchange rate loophole still exists. For example, when I exchanged 720 Mexican pesos for US dollars, according to that day’s official USD-MXN exchange rate I should have got $36 USD. They gave me $37 USD instead. I made a $1 profit. Read on to see how you can make hundreds of dollars profit the same way. 

Fly to Mexico City… For Free?!

Mexico City is a very underrated city. There are tons of cool neighborhoods, cheap and delicious food is everywhere, and there is endless art and culture to enjoy. You should go. Why not go for free? (Or at least for a handsomely subsidized rate.) Here’s how to do it by taking advantage of an exchange rate loophole.

What You Need:

  • About $9,645 USD in your personal checking account
  • An account at a bank that charges minimal withdrawal fees on foreign transactions and good exchange rates on such withdrawals.
    • HSBC and Citibank are good because they have their own ATMs at the Mexico City airport.
  • Approval from your bank to withdraw all $9,645 at once. This, I found out to my surprise, is possible; You just need to call in advance.
  • The cheapest ticket you can find to Mexico City.

Yes, yes, not everyone has enough cash to able to benefit 100% from this plan. And you still need to pay the full flight cost up front. Maybe it’s because you complain so much you don’t have $9,645 sitting around. Free doesn’t always come easy.

How You Do It:

  1. Buy your flight to Mexico City. From Vancouver, Canada I can regularly buy one for $500 or less. From the US it’s often much cheaper.
  2. Before leaving to Mexico, talk to your bank and let them know your desire to withdraw a large amount of cash on the day you fly home from your trip.
  3. Enjoy your trip in Mexico City. Eat, drink, explore, and be contento.
  4. At Benito Juarez airport on your way home, withdraw the $9,645 USD from the ATM in Mexican pesos. This should get you about 171,700 pesos (exchange rates will vary)
    •  Be sure to check the rate your bank offers you is not too far from the actual rate (just Google “USD MXN” to get the current rate).
  5. With those pesos, walk about 20 feet to the exchange office nearest you and trade them back for USD. There is zero commission, so you should get about $10,000 USD (again, exchange rates will vary).
    • Your best bet is to do a quick walk-through of the airport to determine which of the 50+ exchange offices has the lowest USD sell rate.
  6. Fly home with the cash securely in your carry-on bag. Don’t worry too much about theft; Airports are the safest place you can be with so much cash.
  7. Deposit the money as soon as you can once home, ideally at a branch in the airport.

There you go: You’ve turned $9,645 into $10,000, making a tidy $355. That should cover a lot, if not all, of your flight.

How Is This Possible?

In Mexico, locals are severely limited in their ability to deposit USD in their local banks. Local Mexicans who have accumulated USD cash (legitimately or otherwise) therefore have no choice but to buy pesos to be able to deposit their money. This creates a surplus of USD and a high demand for pesos, especially at the airport. It just so happens that you, through your bank, can supply those pesos, and make money doing so.

When you withdraw your $9,645 USD in pesos, you’re providing (via your bank) an outside supply of pesos to the exchange offices that desperately need them. They will eagerly buy your pesos from you for a higher price than you paid for them only a second ago when you withdrew them from the ATM. That’s called arbitrage. In other words, “free money.” The only thing stopping you from making much more than $355 from it is the $10,000 limit on the amount cash you can travel with.

Meanwhile, Beyond Mexico City’s Airport…

Please don’t come to Mexico City just for a little bit of arbitrage. Stay for a taco or two at least.

It’s one of our absolute favorite cities to visit in the world (and we mean that). And hopefully these guides will have you feeling the same:

Disclosure: Whenever possible, we use links that earn us a cut if you pay for stuff we recommend. It costs you nothing, so we’d be crazy not to. Read our affiliate policy here.

Chris and Kim

Kim and Chris are exploring better ways to do everything: think, travel, exercise, work, you name it. Every week, we try to persuade our subscribers to try something different in our newsletter, "Consider This."

6 thoughts on “An Exchange Rate Loophole That Can Pay for Your Flight to Mexico City”

    • Thanks. I doubt it’ll work with the euro because it exists purely so that Mexicans can unload their USD and I don’t suspect they have similar problems with EUR. If you pass through the airport and see evidence to the contrary, please let us know!

  1. Thanks for the tip! Do you remember which of the ATM’s/banks at the airport you used? ATM’s downtown are all limited to 5.000 – 9.000 pesos at once..

    • Hi Bob. When I first researched this for a business I had in Mexico, which was a few years ago now, I talked with a few different exchange offices and they all said they had no limit. For the ATMs, I used Citibank because I have an account with them. I don’t know about the withdrawal maximums, sorry. All the best!


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