40+ Best flash sale email subject lines

Since the early 2000s, flash sales have been a big thing in the eCommerce world. It's an excellent way to promote your business, but it takes some extra effort. The best part is that flash sales can boost customer loyalty, increase sales, and help you manage your stock better. But here's the catch: if you don't do it right, it could help your brand, eat your profits, and upset your loyal customers.

So, what exactly is a flash sale? It's like a remarkable deal of the day on a specific product, and it usually lasts for a short time, 24-36 hours, with some significant discounts. While you can have a flash sale anytime, most brands do it on shopping holidays like Black Friday. That's why sending a flash sale email to your subscribers is a great idea – they should be the first to know about these awesome deals!

Here, we'll help you get started with your flash sale emails by providing effective subject lines you can copy:

Best flash sale email subject lines for teaser phase

Now, at this stage, it's time to shoot out your first flash sale email to all your awesome subscribers. You're giving them the inside scoop that a daily deal is on the horizon. In this email, you can spill the beans on essential details like when the sale will kick off, how long it'll be running, which fantastic product(s) will be up for grabs, and the sweet discount they can expect.

Grab a subject line to accompany your flash sale teaser email:

[First Name], get ready for significant savings!

Exclusive treats await you, [Brand]

Don't miss out on [Brand] deals

[Brand] flash sale: mark your calendar

It's happening soon - [First Name]'s flash sale

[First Name], you're invited to a particular sale

[Brand] secrets: unveil the savings

Limited-time offers coming your way, [First Name]

Be prepared - [Brand] flash sale alert

Stay tuned for [Brand]'s flash sale

Ready for a [First Name] exclusive?

[Brand] surprise sale is almost here!

[First Name], get excited for savings

[Brand] insider: big deals incoming

[Brand]'s exclusive flash sale teaser

Flash sale email subject lines for launch phase

Now comes the exciting part! This is when you send out an email to let your fantastic customers know that the sale is officially underway. Keep this message short and sweet, but make sure it's captivating enough to get your subscribers excited and eager to join in on the action! In this email, spill the beans about the awesome promotions, the star product(s) on sale, and how long this fantastic sale will be running.

Of course, the subject line has to be similarly excellent:

[First Name], exclusive flash sale alert!

Your savings, your style: [Brand] flash sale

Limited-time offer: don't miss out, [First Name]!

Hurry, [Brand] flash sale starts now!

[First Name], get ready to shop & save!

Flash sale spectacular: up to 50% off!

[Brand] surprise: flash sale extravaganza

Grab your deals today, [First Name]!

Flash sale fever: shop now, save big!

Unveiling savings: [Brand] flash sale

[Brand] flash sale is on - shop today!

Flash sale bliss: don't miss out!

[First Name], flash sale fun begins!

Savings too big to miss!

Greenlight for [Brand] flash sale

Good flash sale email subject lines for last call phase

This flash sale email is designed to spark some excitement and get your subscribers to act. You want to gently nudge them by letting them know that your incredible sale is wrapping up in just a few hours. Typically, you'll like to send this email about 4 to 6 hours before the deal closes.

In the email, highlight all the fantastic promotions that are still up for grabs, showcase the star product(s) that are on sale, and, most importantly, clearly mention when this amazing sale will end. It's all about creating that sense of urgency and ensuring your subscribers seize the opportunity before it's gone!

Urgency, of course, has to shine through also in the subject line:

Don't let these deals slip away, [First Name]!

Last call for flash savings at [Brand]

Final countdown: [First Name]'s exclusive deals

Catch the savings wave, [Brand] style!

Flash sale finale: Unwrap your discounts

End of the line: [Brand] flash sale

Grab your share of flash sale fun, [First Name]!

Final hours: Your [Brand] savings await

Countdown to [First Name]'s flash savings!

It's now or never: [Brand] flash sale

Final flash call, [First Name] - act fast!

Flash sale farewell: [Brand] style

Flash sale ends today, [First Name]!

Hurry, [Brand] flash deals disappearing fast!

Your [Brand] deals - last chance, [First Name]!

Hero illustration
Hero illustration

Open Sesame: Subject lines to get your emails read

Your perfect email won't matter if it won't be opened. Want some inspiration? Check these robust subject lines, designed for maximum opens of your promotional emails.
Hero illustration
Hero illustration

Premium capabilities Feels enterprise,
minus the price

All the features your business needs to acquire high-quality leads, grow sales, and maximize revenue from campaigns
using one simple dashboard.

Get Started For Free
shape 1
shape 2
shape 3