Difference Between a Straight and a Flush
A straight is five ranks in a row; a flush is five cards of one suit. Different tests, and the flush wins because it is the rarer hand.
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A straight and a flush both use five cards, but they test opposite things. A straight is five ranks in a row — 9-8-7-6-5 — and the suits can be anything. A flush is five cards of one suit — all spades, say — and the ranks can be scattered. Sequence versus suit. That single distinction is the whole difference, and it also explains why one outranks the other.
Two different tests
| Straight | Flush | |
|---|---|---|
| What it needs | Five ranks in sequence | Five cards of one suit |
| Suits | Any mix | All the same |
| Order of ranks | Must be consecutive | Doesn’t matter |
| Example | 9♣ 8♦ 7♠ 6♥ 5♣ | A♠ J♠ 8♠ 5♠ 2♠ |
Notice each hand only satisfies one of the two conditions. The straight above has five different-looking suits but a clean run of ranks. The flush has five spades but ranks jumping from ace down to a deuce. Neither is trying to do what the other does.
The flush is the stronger hand
When a flush and a straight meet at showdown, the flush wins — it sits at #5 on the ten-hand ladder, the straight at #6. The reason is rarity. In a 52-card deck there are 10,200 straights but only 5,108 flushes, so a flush is roughly twice as hard to come by and earns the higher spot. If a beginner’s gut says the long run of cards looks tougher, the counting says otherwise. The head-to-head is walked through in does a flush beat a straight.
The one hand that is both
Line up five cards that are consecutive and all one suit and you no longer have a plain straight or a plain flush — you have a straight flush, like 9♥ 8♥ 7♥ 6♥ 5♥. It’s a separate category near the top of the ladder, not a straight and a flush scored together. Flush vs straight flush covers that jump, and what is a straight in poker has more on reading runs. The rest of the order lives on the hand rankings hub.