A straight flush is five consecutive cards of the same suit, combining the power of a straight with the beauty of a flush into poker’s second-strongest hand. When you hold cards like 7♥8♥9♥T♥J♥, you’ve achieved what most players only dream about, a hand that loses only to the mythical royal flush.
The straight flush sits at the pinnacle of poker hand rankings, occurring roughly once every 72,193 hands dealt. To make a straight flush, you need five cards that are both sequential in rank and identical in suit. The ace can play high or low, meaning both A♠2♠3♠4♠5♠ (known as a steel wheel) and T♦J♦Q♦K♦A♦ (a royal flush) qualify, though the latter gets its own special designation. The hand’s rarity makes it a guaranteed winner in virtually every situation you’ll encounter at the poker table.
Unlike its individual components, a straight flush cannot be beaten by any number of regular straights or flushes. Even if your opponent holds the nut flush with A♣K♣ on a board showing 6♣7♣8♣9♣2♦, your T♣ gives you a straight flush that renders their powerful hand worthless. This absolute strength is what makes a straight flush such a devastating and memorable hand when it appears.
How Strong Is a Straight Flush?
The straight flush ranks as the second-best possible hand in poker, beaten only by a royal flush (which is technically just the highest possible straight flush). When ranking straight flushes against each other, the highest card determines the winner, a king-high straight flush beats a queen-high straight flush.
| Hand Rank | Example | Beats | Loses To |
|---|---|---|---|
| 2nd Best | 8♣9♣T♣J♣Q♣ | Four of a kind, full house, flush, straight, all lesser hands | Royal flush, higher straight flush |
| Steel Wheel | A♠2♠3♠4♠5♠ | All hands except royal flush and higher straight flushes | 2♠3♠4♠5♠6♠ and up |
| Nine-High | 5♦6♦7♦8♦9♦ | All non-straight-flush hands | Any ten-high straight flush or better |
The probability of flopping a straight flush when holding suited connectors is approximately 0.02%, about 1 in 5,000. Even when you flop a straight flush draw (four cards to a straight flush), you’ll complete it by the river only 8.4% of the time.
What Happens When You Make a Straight Flush?
When you complete a straight flush, the immediate challenge becomes extracting maximum value. Since the hand is virtually unbeatable, your goal shifts from protecting your hand to building the largest pot possible. Most opponents won’t put you on such a rare holding, especially on boards that also create strong hands for them.
Example 1: Hidden Monster
You hold 6♥7♥ and the board runs out 8♥9♥T♥K♣2♦. Your straight flush is well-disguised, and opponents with hands like A♥Q♥ (nut flush) or QJ (straight) will likely pay you off handsomely.
Example 2: Obvious but Irresistible
You hold Q♠J♠ on a board of T♠9♠8♠7♠2♣. The four spades on board make your hand more obvious, but opponents with the A♠ or K♠ often can’t fold, believing they have the nut flush.
Straight Flush vs Straight Flush
When two players both make a straight flush (astronomically rare), the player with the highest-ranking straight flush wins. If the board shows 5♣6♣7♣8♣9♣, a player with T♣J♣ beats a player with 3♣4♣. In the extremely rare case where the board itself contains a straight flush and no player can improve it, the pot is split.
Key Facts
- Frequency: Approximately 1 in 72,193 hands
- Suited connectors: Best starting hands to make a straight flush
- Board texture: Requires at least three suited, connected cards
- Ace flexibility: Can be high (AKQJT) or low (A2345)
- Unbeatable by: Any single flush, straight, or full house
Famous Straight Flush Moments
The 2008 WSOP Main Event featured one of poker’s most brutal coolers when Motoyuki Mabuchi’s A♦5♦ made a steel wheel (A-2-3-4-5 of diamonds) against Justin Phillips’ K♦Q♦ for a king-high flush. Both players were all-in on the 4♦3♦2♦9♠J♣ board, with Phillips eliminated in devastating fashion.
In cash game history, the famous “Million Dollar Cash Game” hand saw Patrik Antonius lose with 9♦8♦7♦6♦4♠ (a full house) to Phil Ivey’s T♦8♦7♦6♦5♦ (straight flush) in a €1.1 million pot, though this was in Pot-Limit Omaha where straight flushes are more common.
Hear It at the Table
“Did you see that run-out? Four to a straight flush on the turn, I’m never folding this flush draw now.”
Key Takeaway
A straight flush combines five consecutive cards of the same suit to create poker’s second-strongest hand, occurring roughly once every 72,000 hands. When you’re fortunate enough to make one, the challenge shifts from winning the pot to maximizing its size, as this near-unbeatable hand often catches opponents with strong but second-best holdings.
