This was originally published on Hugging the Cactus on May 25, 2018. I decided to share it again today because in light of my travels last week and this week, I thought it’d be fun to revisit how my blood sugar was impacted by a long flight. Read on to learn more about my last long flight experience…
I traveled through time last week.
No, I didn’t use a magical device or step through a portal. It’s much more boring than that: I flew across the country, east coast to west coast, to spend a few days in Las Vegas.
Okay, there’s no way in hell that I could justifiably describe my Vegas trip as BORING.
But my point here is that flying through a couple different time zones is totally trippy. And, of course, it impacted my blood sugar. Because why wouldn’t diabetes just cooperatively come along for the ride?

I knew I should anticipate some sort of blood sugar swings going to and from my destination, I just wasn’t sure of when and how they’d hit. But I did know that when I landed in Vegas, the first thing I needed to do was adjust the time on my PDM (my insulin pump). Surely, my blood sugar would not react kindly to thinking that it was three hours later than it truly was in my new time zone. My question, though, was when should I do this? On the plane? After we landed? Should I adjust it slowly, in one-hour increments? Or should I dial it back entirely in one go?
Normally, I would’ve asked my endocrinologist what to do – but I forgot to bring it up during my last appointment with her a few weeks ago. So naturally, I asked the next best source: the Diabetes Online Community (DOC).
The answers I received were varied; nevertheless, I appreciated the immediate replies. I decided to quit stressing about it so much and focus on getting to the actual destination, vowing to keep an eye on my blood sugar for any suspicious trends while on the flight.
Five and a half long hours later, my travel companions and I arrived at our hotel. While in line for check in, I fixed the time on my pump and glanced at my CGM (which I didn’t bother adjusting, since none of the settings on it or my meter were dependent on time). I was steady at 97 mg/dL…not too shabby at all. And I’m pleased to say that I maintained that decent graph for the next day or so. I was nonplussed by the phenomenon, but I couldn’t complain about it.
The next few days are a different story, due to some “lifestyle choices” I made while in Vegas (c’mon, you know all I mean by that is eating junk food and imbibing alcohol). But that’s a tale for another post, coming soon.
This one’s about time travel, and while I had no issues flying TO Vegas, I did encounter trouble flying home FROM Vegas. My friends and I chose to a red-eye flight, which I don’t regret per se, but I’d never done one before and didn’t realize how much trouble I’d have falling asleep on the plane. It was disorienting enough leaving one place at 9 P.M. to arrive in another at 5 A.M., but add a freezing cold aircraft, turbulence, and an unsettled stomach to the mix, and you’ve got a recipe for disaster. As I tossed and turned in my seat, violently shivering a few times, my blood sugar was very slowly, incrementally, rising. I didn’t realize how much until we landed and drove home, where I had to bolus for an out-of-the-blue 308 mg/dL. I was so bloody tired, yet sleep evaded me further as I anxiously waited for my blood sugar to budge – which it did, but not for several, agonizingly long hours.
It definitely didn’t help matters that I wasn’t eating regularly; at the time of our arrival home, I hadn’t eaten real food in about 36 hours due to nausea that wouldn’t seem to leave me alone. I’d muscled down toast and a couple of granola bars, but not much else. I’d like to think that my entire body was just rebelling against me for spending the weekend eating too much pizza, staying up too late, and drinking a little too much whiskey, because that train of thought at least helps me make sense of my lack of appetite and recurring high blood sugars.
I’ve been back on the east coast for a couple days now, and I’m relieved to report that things have settled down. I’m eating regular meals (and I actually feel hungry for them), and besides a few flukes in my CGM graph, my blood sugars are mostly back to normal. I wish I could say that there was some big takeaway from this all: that I know exactly what to do next time I travel through time zones, or that I know just what to do to prevent it. But that’d be silly, because with diabetes, there are just too many variables. At least I CAN say that I know to take it in stride next time, to roll with the punches. Monitor my blood sugar like a hawk, correct as often as needed, eat normal meals as much as possible, and drink plenty of WATER. In any case, isn’t that what diabetes is all about…
…regardless of time travel and/or sorcery?
I always change the pump when I land anywhere going, and I change it to my home time when I leave. So, for instance, going to Korea in 2019, I turned it to local time in Dallas, Tokyo, and Korea as I landed. But as I took off from Korea, I advanced it to US EST when I left Korea. This method has always worked for me; I say I am back to the future back. Or forward, and I can never figure it out.
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