120 Flash Sale Email Subject Lines Guaranteed To Boost Open Rate

Updated: January 17th, 2022

120 Flash Sale Email Subject Lines Guaranteed To Boost Open Rate

Ready to build your open rate?

Luckily, you’ve come to the right place, because we’re going to share with you some of the best email subject lines that sent our open rates through the roof.

Fear Of Missing Out Email Subject Lines

  1. Incredible prices for a limited time. Don’t miss out!
  2. We've got a flash sale going on, and you don't want to miss it.
  3. We're having a flash sale, but only for the next 12 hours. Make sure you don’t miss out.
  4. Here's the deal...we've got an amazing offer in our store right now. For a limited time only, you can get an even bigger discount.
  5. The best products on the market, now on sale while they last!
  6. This weekend only! Don't Miss the Flash Sale
  7. Hurry, this flash sale ends soon!
  8. All the latest trends for fall, ready to ship before Labor Day – flash
  9. You now have a fantastic opportunity to buy this amazing product for a fraction of its value.
  10. Make sure you claim these top deals before they sell out!
  11. We’re celebrating our birthday with a special sale for a limited time!
  12. Our Flash Sale has started! Shop now and save big.
  13. Calling all fashionistas! Our latest Flash Sale is now live! Hurry up and shop for a limited time only.
  14. Grab amazing deals before they’re gone!
  15. Last Chance: Shop now before it's gone!
  16. Our Flash sales are a hit every time. Sign up for the deal of the century!
  17. Don’t miss out, sign up today and receive a flash sale alert. Sounds good right?
  18. Don’t miss out on this one-time flash sale with incredible deals!
  19. Tomorrow is the last day of our flash sale, get 10% off all
  20. Tomorrow is the last day of our nine-day flash sale, so buy while you still have time to save!
  21. Last chance. Act now to save 10% off all office furniture. Offer ends tomorrow at midnight.
  22. Sale today, gone tomorrow!
  23. Don’t miss the chance to save big during our final flash sale
  24. Don’t wait to grab your piece of this great deal – we only have a limited number of flash sales.
  25. Come and get it! Our flash sale is going on now until the end of the month
  26. We’re celebrating July 4th with a flash sale. Get 10% off all of our jewelry.
  27. Grab this deal before it’s gone!
  28. Amazing flash sale, darlin! Some items are already selling out.
  29. Make sure you don't miss this 60% - 70% off flash sale
  30. Going once, going twice...Skype this weekend and save 20% your flash sale.
  31. Discover amazing new designs up to 70% off. Flash sale ends soon!
  32. Our flash sales are HOT, so sign up now!
  33. Be the first with our flash sales. Our hottest, trendiest items go fast!
  34. Our flash sale is brief, so take action while you can!
  35. Emailing you a 20% off flash sale invite. Discount expires tomorrow.
  36. This Saturday Only! A Flash Sale. Don't Miss It…
  37. Ready for our biggest sale ever? It’s tomorrow. Be sure to be on the lookout.
  38. A flash sale is coming up on the weekend. Act fast and take advantage of this incredible deal!
  39. We've all been invited to a flash sale! Grab this chance and make your dream come true.
  40. How’s this for timing? A flash sale just started, and it’s your chance to grab some amazing new items!
  41. Fashion- and eco-friendly fashion brand Capsule is having a flash sale till tomorrow!

Funny Flash Sale Email Subject Lines

  1. I can't believe we are not having a flash sale. Just kidding, your favorite is on its way.
  2. We're sorry, we didn't mean to give you a heart attack!
  3. Your favorite belt just got even more useful.
  4. This flash sale will save you a lot of money.
  5. Make sure you check in before we close our doors. It's already hard to find a bargain this good, but it's only available for a limited time.
  6. So good, you may have trouble believing it.
  7. Leave the winter blues behind you! We have an amazing offer for you. Sharing is caring. Don’t be selfish, share the love with your friends.
  8. If you haven’t yet taken advantage of our flash sale, don’t wait any longer.
  9. Only 3 Usable Hours Until Our Flash Sale
  10. Fresh off the runway and into your closet!
  11. Hi there! This is your official ticket to flash sale heaven, just for you.
  12. We have slashed prices on everything!
  13. It’s always a pleasure getting together with like-minded friends. Now, if you’ll excuse me, there are some dramatic savings to be had.
  14. Turn 1 dollar into 2 in under 5 seconds
  15. Lightning deals flash throughout the day! Our deals are off the charts. Don’t miss out!
  16. Shop for e-books, and do it often! Our flash sales offer incredible discounts on your favorite books—all you have to do is catch them.
  17. Time to kick start the weekend, with a flash sale!
  18. We’re having a little birthday party and want you to be our guests of honor.
  19. Get the deals of your lives in our Flash Sale!
  20. Our flash sales are changing the way you find clothes for work and play. Now, it's your turn to kick start the weekend!
  21. Your go-to source for endless bargains, at prices that are hard to beat. Who doesn't love a good flash sale?

Curiousity Email Subject Lines

  1. I can't believe this isn't a flash sale
  2. Are you kidding me? We give you the best prices everyday, and now this!?
  3. We're having a flash sale and you don't want to miss it...
  4. We’re offering a few items at an unbeatable price.
  5. You’re in for a treat. We’ve got a flash sale on our website!
  6. Hi, we are sending you a Great news!
  7. Hi! I think we should hang out!
  8. Don’t miss out on this great opportunity to get that product you always wanted.
  9. You’re probably asking, “Why should I care? Is this really going to save me money? And if so, how?”
  10. Get an amazing deal from our Flash Sale!
  11. It's almost too good to be true!
  12. It’s almost too good to be true! The possibilities are endless.
  13. Come and Get It!
  14. Hey there! Thanks for checking out my social deal. I think you’re going to love it!
  15. Most irresistible flash sale ever!
  16. Today’s flash sale is so hot we’re throwing in not one, but two extra items into your cart!
  17. The flash sale is coming! Check out this hot item and you could get it for as low as $9.99!
  18. Greetings, fellow flash sale enthusiast. I’m sure you’re as thrilled as we are about these awesome deals.
  19. Shop til you drop with these amazing deals.
  20. Our flash sales events offer you a variety of must-have items at very special prices. Sign up for updates and don’t miss out on an opportunity today!
  21. Hello, I have a social deal for you :-)
  22. Hello! You’ve come across an amazing deal today!
  23. It’s wild, it’s wicked, and our best work yet. See it before its gone!
  24. Don't let this amazing offer pass you by.
  25. Ongoing flash sale! Check it out now!
  26. Attention, Friends!!!! We’re hosting a FLASH SALE for just $12.99!!!!!
  27. Don’t miss our flash sale that’ll make your entire year!
  28. Who doesn't love a good flash sale?
  29. Can't wait to get your hands on this!
  30. Mark your calendar, because these deals will sell out fast! Miss out on our last flash? Check it out here!
  31. Did you hear about our flash sale? We’re giving you a special discount so you can save 50% on your next order.
  32. Hello, I’ve got a great deal for you!
  33. Hi there, I have an amazing offer for you!
  34. We have this super deal that is hard to resist.
  35. Check out the latest deals. Like today’s flash sale, buy 5 items, get 1 for free – for less than you think!
  36. Are you looking for a one of a kind item? Why not shopping at a flash sale today?
  37. Ready to rock the weekend?
  38. All products are heavily discounted.
  39. Our biggest flash sale yet…
  40. This doesn't happen every day!
  41. Here's a little secret but we're not supposed to tell...

Personalized Flash Sale Email Subject Lines

  1. Hi {name} We’re having a flash sale! If you hurry, you can join our guild. We’ll protect you from all the baddies out there.
  2. Hello {name} It’s time for a flash sale
  3. Hello {!firstname}, we are having a flash sale this weekend at
  4. Hi {!firstname}, we’re having a weekend sale. Here are all the details.
  5. Hello {!first_name}, this weekend we’re sending out some special emails to our customers.
  6. Hey [name], you're invited to a flash sale.
  7. Hey there, flash sale connoisseur.
  8. {name}! You can get your favorite items at up to 70% off with our flash sale.
  9. Hey, you! Have you heard of these incredible flash sales! I think it’s time we had a little chat.
  10. Hey! I got a super crazy good deal on this neat thing!
  11. Hi {name}, It’s great to see you and thanks for checking out my special offer!
  12. I don't know about you, but I'm having a flash sale!!
  13. Hi Sweetie, Join the thousands of people who are enjoying the biggest flash sale ever. They’re buying gifts for their friends, or stocking up on treats for themselves.
  14. A Flash sale only for you! Wednesday 6th (all night)
  15. Hey there! It's a flash sale today on [product name]
  16. Hi dear, Join us for our biggest flash sale ever. It’s happening now...
  17. Hey Sissy, Want a new of your favorite things? – flash sale!

Flash Sale To Boost Open Rate Email Template Examples

Here are a couple of great examples of flash sales to boost open rate email templates you can use.


Our BIG SALE at StoreName is only here for 1or2or3_ days and it’s huge!

Every item in our store is now DiscountPerc% off! (We told our bosses they were crazy for doing it!!)

Hurry, our logistics team estimates that this sale will drive many of our clearance items completely out of stock. If you don’t get them from us now, you may not have the opportunity again!

Use this code at checkout to get your DiscountPerc% off your entire order:


Go directly to our store now: StoreURL And be sure to check out these hot items too: PromoURL

We can’t wait for you to get the products you need at this amazing price!

All the best, The StoreName Team


Psst! We're letting you in on a secret. You're invited to our private Black Friday sale. Our friends get early access to make sure you get the pieces you love before we run out!

You get to shop before our sale goes public at midnight! This year save 10% off one item, 15% off two, and 20% off three or more.

You can access the private event through this link.

Happy Shopping! The Mejuri Team


GUIDE: How To Write A Great Subject Line

As we mentioned above, crafting a catchy subject line is critical to the performance of your email campaign.

While just a few words may seem like a small piece of your overall message, this is the first impression your audience will have before they decide whether to open your email.

If your subject line isn't engaging or appealing enough, there's a chance it could get buried in your reader's inbox.

Let's go over the proven tips on how to craft a subject line that boosts engagement:

What makes a great subject line?

First, let's discuss the fundamentals of creating a great subject line:

  • Spark interest and curiosity
  • A clear and urgent call to action
  • An offer/intriguing discount
  • Personalization (this can be done by sending out different versions of emails to subscribers based on their preferences)
  • Relevance - make sure your subject line covers the current trends and topics within your industry

5 Tips To Crafting a Great Subject Line

Now, let's dive into the specifics of how to create a great subject line for your next campaign:

1. Use a familiar sender name

Although this may seem obvious, it's a piece many marketers miss the ball on.

Your readers want to feel like your email is coming from a human and not a corporation or automated system.

One of the easiest and most effective ways to do this is by changing the sender's name to YOUR name or someone in the company that is well known.

Here's a great example of this from Marketing Examples


Pro Tip

Avoid the "no-reply" sender name at all costs. This makes your email feel unfamiliar, unapproachable, and less personable.

2. Keep your subject short and to the point

If your subject line is too long, it will get cut off, which could impact your reader's chances of opening your email.

The rule of thumb (for both mobile and desktop) is to keep your subject line under 50 characters.

3. Add personal touches to your subject line

If you have access to information about your subscriber (ie. name, location, etc), you can use this to benefit your subject line and catch your readers attention.

It's important not to go overboard here, but adding even the simplest touch such as their name can build trust and rapport.

Here's a great example of a personalized email + offer I received from BarkBox with my dog's name in the subject line:


4. Avoid making any false promises

Your subject line makes a commitment to your reader, so it's important you don't stretch the truth just to simply get more opens and clicks.

In the grand scheme of things, making false promises will end up hurting your open rate as your readers will lose trust in you.

5. Give them a sneak peek of what's inside

Telling your subscriber what is inside helps with open and clicks.

For example, if you're providing your reader with a free guide or e-book, consider making your subject line something along the lines of:

"Your FREE marketing e-book awaits!"


If you want your email campaign to perform well, it all starts with your subject line.

Think about the emails you receive in your inbox and what makes you click vs what gets buried - odds are, the same habits go for your customer.

We hope you enjoyed our guide + list of 120 flash sale email subject lines guaranteed to boost open rate.

meet the author
Samantha Walls

I'm Sam Walls, COO of Starter Story - a platform and community for entrepreneurs and future founders to learn what it takes to build a great business. I joined the Starter Story team approximately 3 years ago, with the goal of providing our readers with the best, most valuable, and inspirational content on the internet.